105.1 Cubes Wooden : Of hard wood accurately cut in different colours.

105.3 Cubic Decimetre Plastic : 100mm x 100mm

105.4 Cubes Metal : 10mm side in plastic/wooden case set of 7.

105.7 Bucket and Cylinder : To demonstrate the principle of Archimedes. Brass, 60 mm long 20 mm dia, overall length when extended, 160 mm.

105.8 Hydrostatic Balance : Of Brass Chromium plated, with 3 pans, one of which with shorter stirrup and with hook. Pans adjustable height with downward playing pointer. The balance is mounted on a rectangular wooden polished base. Cap. 250 gms sensitivity 10 mgm.

105.9 Displacement Vessel, Tin/Brass : With overflow spout for specific gravity experiments; size of vessel 115 x 50 mm approx.

105.10 Displacement Vessel, Glass : Borosilicate Glass Cylinder with over flow spout.
Dimension : 120 x 65 mm L D Dia. Approx.

105.11 Displacement Vessel, Large : Hammertone coloured tinplate; with handle and over flow spout; size of vessel 225 x 125 mm approx.

105.12 Eureka Can (Overflow Jar) : Polypropylene body, unbreakable, non corrosive white and has a spout to drain out overflowing liquid, used in a laboratory for measuring displacement of liquids.

105.13 Perspex Container : 50 x 50 x 85 mm internal size with index line at 80 mm depth; for density experiments.

105.14 Spring Balances Metric : Flat form with hook and brass lacquered scale, after Salter design. Most accurate.

 105.18 Spring Balances Metric : Flat form with zero adjustable device having anodized metal scale, metal parts richly plated in high impact polystyrene body individually packed.

105.24 Set of Masses, Brass 100 Gms. : This improved set comprises a 10 gms. Wire hanger with nine slotted masses each of 10 gms. Accuracy ± 5%.

105.25 Set of Masses, Brass 200 Gms. : Comprising 1 hanger 100 gms., 9 slotted weights 100 gms., total 1000 gms. Accuracy ± 3%.

105.26 Set of Masses, Brass 500 Gms. : Comprising 1 hanger 100 gms., 9 slotted weights 100 gms., total 1000 gms. Accuracy ± 3%.

105.27 Set of Masses, Brass 1000 Gms. : Comprising 1 hanger 100 gms., 9 slotted weights 100 gms., total 1000 gms. Accuracy ± 3%.

105.28 Slotted Masses Iron : Made of Cast Iron, black enamelled finish, with large hole in the centre and small slot designed to prevent masses sliding of hanger. Accuracy ± 5%.

105.30 Masses, Iron, Metric : Hexagonal shape with lifting rings, painted. Mass Wt.

105.32 Force Table : For verifying the laws of composition and resolution of forces, comprising a machined aluminium table 40 cm dia. Its raised rim has engine divided scale graduated 360°, on heavy vertical support rod and tripod base. Complete with 1 ring, 4 sliding clamp pulleys, 4 weight hangers and 12 weights (2 x 10 gms, 2 x 20 gms, 4 x 50 gms, 4 x 100 gms).

105.33 Parallelogram of Forces Apparatus : For verifying the relation between forces acting at a point. Board 750 x 500 x 12 mm on battens, with two aluminium pulleys 50 mm diameter, with clamp for mounting in any position; four S-hooks, scale pan 100 mm diameter. Without masses.

105.34 Pulley-Single Plastic : Polypropylene pulley of diameter 50 mm mounted in an aluminium frame with hooks.

105.35 Pulley-Single Metal : Made of aluminium pulley of diameter 50 mm mounted in brass frame with hooks.

105.36 Pulley-Double Parallel Plastic : With two wheels of polypropylene pulleys of diameter 50 mm in an aluminium frame with hooks.

105.37 Pulley-Double Parallel Metal : With two wheels of aluminium pulleys of diameter 50 mm in an brass frame with hooks.

105.38 Pulley-Triple Parallel Plastic : With three wheels of polypropylene pulleys of diameter 50 mm in an aluminium frame with hooks.

105.39 Pulley-Triple Parallel Metal : With three wheels of aluminium pulleys of diameter 50 mm in an brass frame with hooks.

105.40 Pulleys-Double in Line Plastic : Two polypropylene pulleys of diameter 50, 40 mm in an aluminium frame with two hooks.

105.41 Pulleys-Double in Line Metal : Two aluminium pulleys of diameter 50, 40 mm in brass frame with two hooks.

105.42 Pulley-Triple in Line Plastic : Three polypropylene pulleys of diameter 50, 40, 30 mm in aluminium frame with two hooks.

105.43 Pulley-Triple in Line Metal : Three aluminium pulleys of diameter 50, 40, 30 mm in brass frame with two hooks.

105.44 Pulley, Differential, Aluminium : A one-piece triple pulley with diameters of 38, 51 and 63.5 mm in metal frame with hook.

105.45 Pulley, Aluminium, Single Clamp type : A 50 mm diameter pulley with a wide groove, mounted in iron frame, designed for clamping to the edge of a bench with the pulley in a vertical plane. The clamp will accept a bench top of up to 25 mm thickness.

105.46 Pulley All Purpose : Aluminium pulley 50 mm diameter with groove for cord, mounted in iron frame. The frame is universal type with 2 clamping screws. The pulley can be clamped in any position on bench, rod upto 13 mm dia. Wall or on table etc.

105.47 Pulley Block (Midget Hoist) : Tested to 680 Kg. For safe working load of 225 Kg. Two four blocks lubricating wheels 32 mm diameter safety hooks at top and bottom and autogrip device, with nylon rope 22m long for lift 2.5m lift. Mass of unit 0.7 Kg.

105.48 Pulley All System : Almost every kind of pulley experiment can be demonstrated with the help of this equipment. It is very much interesting and of educational value to students, comprising of wooden polished base of 100 x 20 cm size with two metal supports, and a horizontal bar having eight adjustable collars with hooks from which pulleys can be suspended. The following accessories are provided with the unit. Single pulley with hooks 7, Pulley Triple long 2, Pulley Triple parallel 2, Wheel and axle 1, Capstan 1, Slotted weights hanger 50 gm 7, 10 gm 3, 20 gm 3, 50 gm 2, 100 gm 7, 200 gm 4.

Note : Slotted weights and hangers are made of iron chrome-plated.

105.49 Pulley, Rod Type : Aluminium pulley 38 mm diameter, mounted on light alloy rod 10 mm diameter, 150 mm long.

105.50 Pulley, Board Mounting : Aluminium pulley, 22 mm diameter, in metal bracket with mounting plate 35 mm long, with fixing holes.

105.51 Pulley, Aluminium, Plain Bearing : Comprising a 70 mm diameter pulley with a wide groove for whipcord, mounted in an iron frame designed for clamping to the edge of a bench with the pulley in a vertical plane. The clamp will accept bench tops of upto 25 mm thickness.

105.52 Screw Jack : For demonstrating the efficiency and coefficient of friction. Grooved light alloy platform, 17.5 cms diameter; screw with 12 mm pitch square thread; cast iron base with arm and clamp for holding pulley on stem at any height. With scale pan 15 cms diameter and 2 meter cord.

105.53 Train of Gear Wheels : For demonstrating the relationship between velocity ratio and number of teeth. Three gear wheels, approximately 60, 80, 110 pitch diameter, with 12, 18, 24 teeth respectively, each mounted on wooden board provided with grooves for adjusting gear wheels by changing belt.
Overall dimensions approximately 240 x 260 x 300 mm.

105.54 Simple Wheel and Axle : Two wheels 150 mm and 75 mm diameter formed from solid hardwood with flat bottom grooves. Supplied with metal axle and cord.
Dimensions : 150 mm diameter x 45 mm.

105.55 Wheel and Axle Compound : Made of cast aluminium alloy wheel 100 mm dia axle 50 mm and 25 mm dia, mounted on adjustable steel cones in steel frame, mounted on a wooden board with 4 holes for wall mounting complete with 5 meter Nylon cord and steel hook.

105.56 Double Cone on Ramp : The inclined plane consist of two tapered slats conversing at their lower ends. When the double ended cone roller is placed on the plane, it rolls towards the high end. Thus the centre of mass of the roller is lowered as the roller moves "up" the slope made of hardwood polished.
Dimensions : 700 x 40 x 70 mm.

105.57 Projectile Apparatus : To illustrate that a body impelled horizontally will fall vertically at the same rate as a similar body allowed to fall freely. Comprises spring loaded, L section launcher with holes for locating two 19 mm dia steel balls which act as projectiles. Launcher is released by push button and projects one ball forward which allows the other to fall freely mounted on wooden block, 180 x 60 x 30 mm with storage pocket for balls. Complete with 2 steel balls.

105.58 Collision in Two Dimensional Kit : Curved ramps 260 x 325 mm. Length x radius with metal ball track, fitted to base 140 x 90 mm length x width, one adjustable ball supports, one clamp to fit slot on base of ramp. One plumb line assembly and 2 steel ball 12 mm dia.

105.59 Dynamic Trolleys : 300 mm long, metal reinforced at ends, having three low-loss bush bearing PVC wheels and fitted with spring-loaded impulse rod. Rod has three positions to provide different impulses and is triggered by a release pin. With removable metal pins at each end to enable trolleys or masses to be stacked or to provide anchoring points for accelerating cords.

105.60 Trolley Runway : This is designed to provide a smooth flat easily inclinable surface for dynamics experiments using trolleys. Wrap Resistant wood board, 2450 x 300 x 20 mm thick, reinforced with metal angle side rails. Complete with six feet for levelling or inclining the runway, two fixed centrally and two at each end adjustable for height.

105.61 Ticker Tape Timer - A.C. : Operates on 12V A.C. The timer employes electromagnet, with spring loaded armature which vibrates above a support table for a carbon paper disc. Paper tape, drawn through guides on the table, is struck by a dotting screw carried on the armature. Additional with extra guides accommodate 4.5 mm external diameter rubber tubing for the 'Pearls in air' water drop experiment. The peg on the support table is movable to allow maximum use of carbon paper discs. Supplied with 90m roll of tape and carbon paper discs.
The ticker tape Timer produces dots spaced at 1/50 or 1/60s intervals depending on main frequency.

105.62 Ticker Tape Timer - D.C. : As similar to 52, but operates on 12V D.C. Produces dots at 1/50s intervals only.

Spare Parts
a) Ticker tape, width 9.5mm, in rolls approx. 300meter long.
b) Carbon paper Discs. Pack of 100.

105.64 Flectcher's Trolley : An aluminium track, 1720 x 150 mm wide with levelling screws. Aluminium pulley 50 mm dia. clamp for vibrator and automatic pen release. Aluminium trolley 690 x 80 x 65 mm, with three wheels mounted on ball bearings, five holes to accommodate cylindrical masses each approximately 350 gms. Vibrator 600 mm long with clamping marks at 5 and 8 Hz and pen holder with one each wood block 150 x 75 x 13 mm, 150 x 75 x 23 mm and 150 x 75 x 50 mm. Without pen and paper.

105.65 Inertia Bar : Discs at the ends are screwed and can be removed. Split chuck for clamping can be screwed in the middle of the bar or at either end. Length 25 cms.

105.66 Gyroscope : The brass wheel is 7.5 cm in dia 3 cm at its rim, carefully balanced and all three pair of pivots are adjustable. Complete fitted on stand.

105.67 Centripetal Force Kit : Comprises 20 each of the following : Glass tube 125 x 8 mm length x diameter, rubber tube 100 x 8 mm, length x bore, rubber stopper two hole, plastics rod 25 x 6 mm, length x diameter, wire hook (Paper clip), crocodile clip index; 200 metal washers; one ball of cord 30 m.

105.68 Turntable / Flywheel : The apparatus consists of a circular wooden top 300 mm diameter and 12 mm thick attached to a strong ball bearing spindle provided with a driving pulley, 80 mm diameter and a support rod for mounting in a large tripod base or boss head.
Holes are drilled in the table and bolts are supplied for securing the various interchangeable accessories.

105.69 Rotating Platform : Comprising a platform 310 x 310 mm. The large diameter bearing is designed to withstand off centre forces at the same time allowing free rotation. The base is fitted with anti-slip rubber feet.

105.70 Inclined Plane, Simple and Friction Board : A planed board, 600 x 75 mm, hinged to the base at one end and provided with a pulley for the force cord at the other. A movable block enables the inclination of the plane to be varied. The friction slide, 100 x 65 mm is reversible and has one side cut away for half its area. Complete with brass roller 75 x 25 mm diameter. Without masses or scale pan.

105.71 Inclined Plane : For experiments on sliding friction. Comprises inclined wood plane, 600 x 100 x 20 mm, with 22 mm diameter pulley, hinged to wood base, 450 x 100 x 20 mm. Linear scale fixed to edge of plane and vertical linear and 0 to 45° angular scales fixed to base with clamp, shaped for use as index. With one each wood blocks, 200 x 75 mm and 100 x 75 mm, steel block 100 x 75 mm, scale pan 75 mm diameter, cord and hooks.

105.72 Inclined Plane : The apparatus comprises two wood strips mounted on a heavy cast-iron base, friction reducing surface covers the inclined plane. An adjusting clamp and 50 mm diameter pulley are provided at the top of the incline and a linear scale is fixed to the side. A 0 to 45° angular scale is screwed to the base.
Dimensions : Overall length without pulley 550 mm approximately, width 150 mm.

105.73 Friction Kit : To provide a simple demonstration of the relationship between friction and reaction. Kit comprises warp free wood board, 760 x 150 x 20 mm thick, with steel eyellring in one end edge, 10 stainless steel rollers 190 mm long x 13 mm diameter, 4 wood blocks 230 x 115 x 20 mm thick, one of which has a steel eye in oneedge, and a stout metal crank handle in a U shaped bracket, 90 x 50 mm to two board on rollers. Without spring balance.
Accessory : Spring balance 1 Kg.

105.74 Liver Simple Form : For introducing the concept of equilibrium leading to an appreciation of the principle of the beam balance. Consisting of a polished box wood rule 1m in length, divided in centimetres and millimetres on one edge, and inches and tenths on the other. Drilled every 2 cm. Without riders.

105.75 Riders Only: For the above lever, set of three : one acts as a fulcrum and the other two as weight hangers. Complete with pins.

105.76 Lever Kit : To provide a simple 'See-Saw' for experiments on balancing masses, leading to the principle of the lever. Also to show that there is no net change in energy in the moving masses.
Comprises 5 wood beams, approximately 610 x 44 mm graduated at 38 mm intervals, 4 "U" shaped supports, grooved to locate fulcrum pins, 40 brass 'penny weights', 25 x 25 x 2 mm and 20 fulcrum pins for insertion into edge of beam.

105.77 Microbalance Kit : A kit for eight students enabling each to build up a workable (Straw Beam) micro balance with which quite accurate weighings can be made.

Contents :
9 wooden base blocks 38 x 38 x 19 mm
9 wooden index strips 150 x 19 x 1.5 mm
9 rubber bands, 50 mm long
9 balancing screws 50 mm long
9 needles, fine, for pivots
9 balancing screws 12.5 mm long to fit straws
9 aluminium bearing channels 50 x 16 x 26 mm deep
100 Drinking straws
Complete with equipment notes.

105.79 Simple Pendulum, Steel / Lead / Brass : Comprising a solid sphere with a small ring of suspension. Available in three sizes as listed below.

105.81 Kater Pendulum : A stainless steel rod 1200 mm long, 10 mm dia, with one pair each of small and large brass and ebonite masses, two steel knife edges set in adjustable metal holders and a metal bracket with holes for wall mounting.

105.82 At Wood Machine : This machine has brasspipe upright 240 cms (8 ft.) long graduated in cms. Metal fittings and arrangement for exact adjustment, vertical and horizontal. No dropping platform. Electric release weights start falling instantly circuit is broken. Wheel of aluminium 10 cms. Diameter is carefully adjusted and balanced on steel agate bearing; platform with sliding weights and over weights.

105.83 Guinea and Feather Apparatus : A hard glass tube 650 mm length x 15 mm dia unevacuated fitted with stopcock to screw into air pump plate, supplied with a small coin and a feather.

105.84 Fly Wheel : About 20 cms in dia by 44 mm wide turned and carefully balanced, mounted on a horizontal shaft held in ball bearings. The wheel is marked and pointer is fixed to the bracket. The bracket has four holes and can be fixed to the wall also.

105.85 Spring Extension Steel : Of 26 s.w.g. wire, closely wound, 6 mm dia approx. loops at both ends.

105.87 Hook's Law Apparatus : The apparatus consists of a 15 cm adjustable mirror scale mounted on a sturdy support 30 cm high, an adjustable hook and a spring with a weight hanger are attached to the top of the rod. A pointer is fastened to the weight hanger, 5 pieces of 50 g slotted weights are recommended for use with the apparatus.

105.88 Young's Modulus Apparatus : Searle's pattern. The instrument consisting of two frames connected by a link. The frames are fitted with self cenring chucks. An accurately graduated micrometer screw to read to 01 mm is fitted on one frame. One end of a sensitive spirit level is pivoted to one of the frame, the other end rests on the poins of a micrometer screw fitted in the other frame. The bubble of the level is adjusted to its zero mark and the reading of the micrometer observed. The load is then applied and by turning the micrometer screw the bubble is again adjusted to zero. The reading is observed and the difference between the reading gives the extension of the wire. Complete with chucks, ceiling attachment and tension weight. With case.

105.89 Young's Modulus Apparatus : Simple form but efficient. Consist of a brass scale 10 cms. long and vernier to read 1/10mm with V slides clamps, guides for wire ceiling attachment and tension weight.

105.90 Torsion Apparatus (Horizontal) : Searle's pattern, two cast iron feet each with 3 through holes and grub securing screws, separated by 2 supporting rods approximately 700 mm long one of which is graduated in cms and mms, wheel 165 mm dia, over groove moving in ball bearings, mounted on front foot, with spindle carrying split collect chuck for holding one end of test rod 55 cms long 5 mm dia, other end supported with clamping block through rear foot. With two aluminium scales graduated 30-0-30 in single degrees, mounted onpillar supports, which are adjustable along the rod, two pointers with clamp for attaching to specimen, one each of Brass and Steel rods, cord and hook for carrying masses but w/o weights.

105.91 Torsion Apparatus Vertical : It consists of a heavy mild steel frame mounted on a heavy trileg cast iron base. Upper end of the rod 900 mm length and 5 mm dia under test is clamped by a 3-jaw chuck and the lower end is clamped, into the axis of a torsion couple three metal circular scales graduated in single degrees which are free to slide on one of the graduated rod can be clamped at any position. Three pointers for clamping to the test rod are provided. Strings to apply the deflecting couple and having pans at their free and pass over bearing pulleys which are clamped to the uprights without weights.

105.92 Dynamometer, Rintoul : Spring with zero adjustment, scale 0-500 g x 100 g, spring extends 20 mm / 100 g, with scale pan dia 75 mm.

105.93 Scale Pan : Light alloy, 150 mm dia with chains and ring.

105.94 Bending of Beam Assembly : For determining Young's modulus for the material of a beam when supported at its extremities. Comprising a metal chrome plated bar 1 metre long, resting on the knife edges of 2 heavy table clamps, hanger with knife edge support to rest on the beam with micrometer or spherometer attachment and with electric contacts. But without weights.

105.95 Maxwell's Vibration Needle : All brass N.P. For experiments on rigidity. It consists of a hollow brass tube graduated with scale divided in mms and with vernier to read 0.05mm. 40 cms. Long, 18 mm dia fitted with a small chuck and carrying a mirror, 2 solid cylinders and 2 hollow cylinders all 10 cms long accurately fitted in the bore of the tube and ceiling attachment with chuck.

105.96 Wall Bracket for Vibration Needle : A heavy metal L shape strip with chuck nuts and two holes for fixing on the wall.

105.97 Elastic Materials Kit : In this kit various materials such as springs, rubber blocks, wire, rubber cord, tube etc., are provided for class experiments to explore 'elasticity' by performing experiments on compression, torsion, extension and elastic limits. The standard pack is one-quarter class kit, i.e. sufficient for eight students and contains :

25 expendable steel springs
2 wide steel springs 114 x 75 mm diameter
2 soft latex foam blocks
1 50g reels of 32 s.w.g. Bare copper wire
2 50g reels of 26 s.w.g. Bare copper wire
1 length valve rubber tubing
4 elastic cords with eyelets
4 soft erasers for twisting

105.100 Hydrometer Nicholson : Of bras chromium plated, hollow body joints soldered overall size 250 x 35 mm height x dia with upper loading pan and lower loaded weighted pan.

105.100 Hydrometer Universal : A direct reading relative density hydrometer of streamlined form with parallel graduated stem and shot-loaded bulb. All glass.