Organic Models

201.225 Shape Of Seven Crystals : These modles clearly explain how basic 7 types of crystals look like and why they differ with each other. You can measure the angle & axes like a=b=c etc. You can explain the centre of symmetry also in each crystal.
a) Cubic
b) Rhombohedral
c) Orthorombic
d) Triclinic
e) Tetragonal
f) Hexagonal
g) Monoclinic
Sizes of thses modles vary between 8cms & 15cms.

201.226 Shapes Of Polyhedra : These multi-utility modles are indeed an assest in explaing the basic shape. Modles of perfect shape made of transparent acrylic plastic to give a clear 3 dimensional idea to students. You can al;so show the axis.
a) Cube
b) Tetrahedron
c) Octahedron
d) Square Pyramid
e) Pentagonal Pyramid
Bipyramids
f) Trianle Bipyramid
g) Pentagonal Bipyramid
h) Hexagonal Bipyramid
Size from .01 to .05 between 10.5 cm & 18cm.
Size from .06, .07, .08 between 20cm & 25cm

201.227 Transparent Models : Teachers eaplaning the structure of crystals with these new type of modles made of tranparent acrylicplastic. They offer an easy and direct way to familarize th student with Crystal Lttics by focussing on the 3 dimensional arrangement of ions in crystals. The Atoms in various shape are moulded with Stryene and pasted inside the modles with solvents. Size of the atoms based on Ionic Radil. Colours of atoms as per scientific tradition number easly.
Unit Cell Structure
a) Sodium Chloride
b) Calcium Chloride
c) Potassium Chloride
d) Diamond
e) Graphite
f) Silicon
g) Germanium
h) Aluminium
i) Neon
j) Black Phosphorous
Closing Packing
k) B.C.C (Iron)
l) F.C.C (Copper)
m) H.C.P (Zinc)
Sizes of these modles very between 9cm & 18cm, depending upon the structure. Modles of flourite, rutile, Zinc Blende, Wurtzite, Calcium Carbide, Boron, Nitride are also available.

201.228 Atomic & Hybrid Orbital Models Set : The Marvellous set of Orbital Models offer an easy 3 dimensional approach to the Quantum Machine & its application to chemical bonds. these are bright, large, colourful and strdy.
The unique advantages of our model are (a) the perfect shape of each of each orbital can be shon, (b) The positive & negetive region of the orbital are indicated with the shade of colour (c) the cross section of orbitals to pinpoint the inner orbital region, nodal planes & probable electronn regions, and (d) The convenience of splitting the model into the halves to show nucleous.

Combination of 2S & 3P & its cross section
1 set is supplied in a plastic case with a Teachers' Guide. The contents are as listed above.

201.229 Simple Inorganic Molecule Kit : The basic Concepts about the Principles of molecular shape made easy...This kit offers a lot of 3 dimensional Models with a visual appreciation of Molecular Bonding. You can demonstrate how the shapes of Molecules are determined by the number of bonds plus the lone pairs in the velence shell of the centre atom. Showing lone pairs a unique speciality with these models. To show the molecule based on tetrahedron you can make methane, for triagnal bypyramid, you can make phosphorus phosphours pentachloride; and for octahedron you can build sulpher hexa flouride and soon.
Some Of The Structures : CO₂, CH₄, PCL₅, SF₆, NH₃, H₂O, BCL₃,Sulphur rings S₈ Oxides of Nitrogen, Phosphorous, P₄molecule, H₂SO₄, Simple Complexes & many more.
Contents : Oxygen, Nitrogen, Sulphur, Phosphorus, Chloride, Hydrogen, Covelent & Multiple (total commponents about 140nos. within a smart plastic case. A teachers guide/instruction manual with full details on how to make all these mode and more.)

201.230 Hybrid & Molecular Orbital Models Set : Teaching the complicated shapes of Molecular Orbitals become so simple to explains with this set. These colourful & 3 dimensions Modles show the correct shapes of orbitals, the nodal planes relating to the bond axis and nuclear axes. You can also aplit the model to show nucleus. Darker & lighter shades in dicated Positive & negitive regions.
Complite is supplied in a plastic case with a Teacher's Guide. The contents are as listed below:

201.231 Organic Molecular Building Kit : Innovatively designed for your convenience... This kit offers you the models for almost all the important structure covering each and very topic. The main speciality is the design of our atom with moulded prongeto provide maneouverability for rotation. You can show the electron clouds. Separate tubes provided for covalent & multiple bonds. Hence, these models are way ahead of the ball & Stick type.
With this kit, you can build plenty of modles. Saturated hydrocarbons, unsaturated hydrocorbons, Functional groups : Alkanes, Alkenes, Alkynes, Alcholos, Aldehides & Ketones, Benzene & its Derivatives, etc. & many many more.
Contents : Corbon, Oxygen, Nitrogen, Chlorine, Sulphur, Phosphorous, Hydrogenatoms, Covelent bond Hydrogen bonds & Multiple Bonds (Total Components about 200 nos. within a smart plastic case. A teachers guide/instruction manual with full details on how to make is also provided.)

201.232 Molecular Model Set : Made of plastic. for modellling three dimensional simple or complex molecular structures of organic and inorganic compounds with universal code for atoms. The set sontains 15pcs. black balls with 4 holes representing Nitrogrn. 6 pcs. Medium size Red balls with 2 holes representing Oxygen, 4 pcs, Medium size yelloe balls with 2 holes representing Sulphur, 10 pcs small size white balls with 1 fixed likage representing Hyrogen, 5 pcs smell size white balls with 1 hole representing Hydrogen, 10pcs small size green balls with 1 hole representing Halogen, 5 pcs small size brown balls with 1 hole representing Halogen metals. Set of 60 balls with polythene Likages of different sizes. All items packed in velvet lined box with instructions.

201.233 Molecular Model Set : Same as catalogue No 201.232 but set of 90 balls.

201.234 Molecular Model Set : A set 370 moulded plastic balls. Set containing 30balls of 25 mm size Black colour representing Carbon Ethylennic and Acetylenic 25balls of 25 mm size mm size Green colour representing Halogens, 20 balls of 25mm size yellow representing Sulphur, Selenium, etc. 20Balls of 25 mm size Organic colour repreenting Sodium, Potassium etc., 30 balls of size 19mm red colour representing Oxygen, 30 balls of size 19mm Blue colour representing Nitrogen, 30balls of 19 mm size Yellow colour representing Aluminium, Chrominium etc., 30 balls of size 10mm Orange colour representing Calcium, Magnesium etc. 125 balls of size 12mm white colour representing Hydrogen 150 white Lugs representing Valency Bond also included in set and all items are packed in compartment box.

201.235 Periodic Chart Of Atoms : A detailed chart, screen printed on Rexin in 4 colours showing solids. Liquids and Gases in separate distinctive colours together with their Atomic numbers. Atomic weight., Electronic structure, Electronegativity. First ionozation Energy, crystal structure. A complete information about 106 elements is given. The index gives at the side shows the details of information provided for each element.
This large size chart is specially mounted on superfine white raxine alongwith rollers atc.
Size of chart 100x130cms.

201.236 Model Of Graphite : Set consists of 69 connectors, 8 black connectors, 45 black jacks and 12 red in a box with instruction manual for construction.

201.237 Model Of Sodium Chloride : Set consists of 54 connectors 13 black and 14 red jacks in a box with instruction manual for construction.

201.238 Model Set Of Diamond : Diamond Crystal consists of 84 Connectors and 57 jacks in a plastic box with instructions manual for construction.

Callipers

201.239 Calliper Inside And Outside : Made of superior steel, chrome plated double from for internal and external measurments. Maximum dia 60mm, overall length 105mm.

201.240 Calliper Vernier : Made of steel, chrome plated, double scal 0 to 125 mmx0.1mm and 5x1/16 Inch, bevelled cross hors for internal measurements, sliding jaw.

201.241 Clliper Vernier With Wheel : Made of steel, chrome plated sclae 0 to 125mmx0.1mm and 5x-0.25 inch, bevelled cross hors for internal measurements, sliding jaw, fine adjustment thumbwheel and depth guage.

201.242 Calliper Vernier With Photo Etching : Made of steel, chrome plated, double scale 0 to 150 mmx0.1mm and 6½ x -1/16 inch. belleved cross horns for internal measurements, sliding jaw, fine adjustment thumbwheel and depth gauge. Packed in plastic pouch.

201.243 Calliper Vernier : Made of Steel, Chrome plated, heavy type, double scale, metric scale graduated to 150mm, vernier reading to 0.1mm. Inches scales graduated to 6½ inch. bevelled cross horns for internal measurments, sliding jaw with thumb movement for finr adjustment IME type, packed in velevt lined box.

201.244 Calliper Demonstration Model : Made of seasoned wood and aluminium, nicely finished. 500mm long.

201.245 Micrometer Screw Gauge : With ratchet stop, stainless steel rod and brass body, with scale of 0 to 25mm, pitch 1mm. Packed in velvet lined box.

201.246 Micrometer Demonstration Model : Made of aluminium black spray painted, 200mm long.

201.247 Vernier Demonstration Model : Two interchargeable vernier are supplied, one reading to 0.1 and other to 0.2 division (Five divisions on vernier equal to nine divisions on scale) with bold white lines on a black backgrounnd. Overall length 850mm approx.

201.248 Steel Rule : Made of bright steel, divideed on both sides one side centimetre in milimeters and 0.5 mm and other side in inches in 8ths 16th, 32nds, 64ths.

201.249 Tape Measure : Unbreakable plastic case with press button. 12mm steel blade. Power return action.
a) 2 meter long
b) 2 meter long

201.250 Tape Measure : For general purpose tape woven to width with interwoven longitudinally for additional strength, coated with special paints for protection against moisture, wear and tear. Case of tape made of zinc coated steel sheet with flush winding handle. Printed one side in metric and one side in feet-inches.

201.250 Stop Clock : Two sweep hands, one indicating seconds, the other recording minutes. Start lever hand side, zero resert lever on right hand side. Movement housed in metel case with stain finish paint. Dail approx. 100mm. Divided 0-60x1 seconds. Runs for 24 hours on one winding.

201.251 Stop watch : With start, Stop & Reset by Consicutive Pressure on it winder.
a) With 1/5 of Seconds
b) With 1/10 of Seconds.

201.252 Stop Watch, Electronic : Digital, 1/100 sec, works on pencil cell. With 7 mm digit size.

201.253 Vernier Microscope : The vernier microscope is a instrument fro use in schools and colleges. The cariage slides on a cast iron base guided by a machine vee and flat. The carriage may be adjustment by manual pressure, and then, with a licking screw at the end of the slide. The carriage carries the vernier, and a swing-over magnifier, permitting measurements to be made to an accuracy of 0.01 mm. The carriage has two locations for the microscope, one on the carriage top face and the other on the side enabling the microscope to be mounted with its axis in any one of three positions with respect to travel. An index mark on the incroscope mount is matched to a mark on the carriage to ensure correct alingment.
The base caries a metal stage plate which can be removed if disered. The microscope is focused by a rach and pinion and is fitted with a glass crossline graticule and a draw tube.
Specifications :
Scale : 165 mm with vernier reading 0.1
Eyepiece x 10 Ramsden
Objective x 3, focal length 50mm
Total magnifiction x 30
supplied in a Polished wood case.

201.254 Vernier Microscope : The microscope carriage, which is supported on a nickle silver column with engraved graduations, can be positioned on either side of the column.
The vertical column is mounted on the traversing carriage that move along the horizontal scale and has a swing out magnifier for reading the vernier. The castion base has a removable glass stage plate, and is fitted with three levelling screws. A circular spirit level is provided on the travelling carriage.
Both carriage can be moved along their scale for aproximate setting of positions, fine adjustment of the carriage being made with the fine-thread screw at the end of each slide.
The microscope tube is focused by rack and pinion, can be set vertically or horizontally and is fitted with a glass crossline graticule and an eyepiece.
Specification :
Scale : Vertical 0-120mm with vernier reading 0.01mm. Horizontally 0-165mm with vernier reading 0.01mm
Eyepiece x 7 Ramsden
Objective x 3, Focallength 50mm
Total magnification x 21
Supplied in a polished wood case.

201.255 Tubes Of Melting Point Apparatus : Capillary tubes, open at both ends, 100x2 mm (Length x dia)

201.256 Oil Film Kit : For investigating of surface tension effects. For economy convenience the complete system is offered as two separate units. The experimental kit provides essentially for the needs of two students working together. The kit contains 2 metal tray size 450x300x20mm with drain hole and rubber bung, 4 surface wiping metal booms, 8 levelling wedges, 16 mounted wire loops, 8 plastic graticules with special holders for prepration and measument of oil drops, olive oil, 8 beaker 10ml, lycopodium powder 50gm., 5dispensers, 1 paint brush soft bristle,50mm, 1 paint can 2 sponges, camphor, paraffin wax and vegetable black.

pH Meters

201.257 pH Meter : An ideal, elegent, rugged and versatile instrument for fast and accurate pH and ORP measurement in any laboratory.Resolution 0.01 pH or 1mV. Out put for recorder.Automatic polarity indicator. Range pH mode : 0.00 to 14.00 pH, mV Mode : 0 to ± 1998 mV. accuracy pH mode ± 0.01 to ± 1 digit, mV mode ± 1 mV ± 1 digit. Input Impedence greater than 102 ohms. Temperature 0 to 100° C Manual.Auto (Optional) compensation. Recorder pH Mode 0 to ± 10mV. LED display 3½ digit 0.5" seven segment.Works in 220 V ± 10% A.C. 50Hz.
Dimensions : 75x275x175mm (HxWxD)
Accessories :
a) Combination Electrode
b) Electrode Stand
c) Buffer Tablets.

201.258 pH Meter, Portable : The smallest, self contained, hand held DIGITAL pH Meter for accurarte and instant pH measurement. Easily readable 3½ digit LCD display. Resolution 0.01 pH. Automatic indication of low battery. Very Low current consumption.HIgh quality combination electrode. Range from 0.00 to 14.00 pH with accuracy 0.02 pH ± digit. Operaters on 9 volts battery. Temperature compensation 0 to 100° C manual. Operating temperature 1 to 45° C.
Dimensions : 165x85x28mm (LxBxH)

201.259 Pneumatic Troughes : Made of glass, flat bottom, round, ground edges.

Pipettes

201.260 Pipette, Volumetric : Made of netural glass, with one mark, bulb from.

201.261 Pipette, Volumetric : Made of Borosilicate glass.

201.262 Pipette, Graduated : Made of netural glass accurately graduated, straight form. (CapacityxSub. division in ml.)

201.263 Pipette Graduated : Made of Borosilicate glass, Graduated as cat No ....

201.264 Pipette, Dropping : Straight form, with rubber teat. Overall Sizex110mm

201.265 Microlitre pipette (Variable volume) :
Fine Mechanism : Accupipet's includes a highly accurate Plunger, a Seal and an 'O'- ring which does not require routine lubrication and maintenance.
Accurate Volume Setting : Its volume is adjusted with in its range only by turning the Knurled Ring in either direction.
Digital Display : It has a usar-friendly Window that helps in reading from top to bottom, the volumetric measurements in microliters.
Safe and Convenient : It has a detachable stainless steel Tip Ejector for automatic ejection of Pipette-Tip-especially whien there is danger of infection or while handing radioactive media.

201.266 Pipette Filters : For use with bulb and cylindrical pipettes up to 25cm3. Simple and easy to use with finely adjustable thumb wheel, no possibility of sucking back of liquid into filter. They have a flexible holding socket to minimise possible damage to pipette and a spesial liquid release value. Ideal for bromine trichloromethane, tetrachloromethane, acids and alkalis.

201.267 Pipette Stand : Made of seasoned wood, polished, to hold 12 pipettes in horizontal position. The stand is detachable for easy storage.
Oveall dimensions : 220x150x220mm (LxWxH).

201.268 Pipette Stand, Polythene, Circular : Stable non corrosive, detachable stand. Holds 28 pipettes having maximum dia14 mm. The base has 225 mm dia with a polythene coated square rod having length 375 mm screwed into the base. Two indepndently adjustable discs having 1765 mm dia are provided. Small pilot holes in the bottam discs provide a rest for the pipette tips and drainage of liquids from the Pipette to the baser of the stand. The base has a rim and acts as a drip tray. Arrow marks provided on the disc should be parallel, when fixing to ensure that the corresponding holders are centered.

201.269 Automatic Pipette washer : This unit a capacity of washing device. Especially recommended for serological, becteriological or clinical laboratories. It operates on a siphonic principle to send a siphonic principle to send a continuous flow of water over and through the pipettes. At a most normal pressure the water is completely changed in cycle of about one minute. Even at reduced pressure this washer operates efficiently. It consists of a brass washing cylinder 22" heightx6' in diameter mounted on base 10' in diameter and a removable pipettes holder which is of 5½" diameter.The holder is completely made of brass nickel plated with a heavy mesh bottom. The cylinder has a permanent drain if desired.
This unit will accomodate pipettes upto 375 mm in length.