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For the examination of liquids open the prism box and place a few drops upon the ground surface of the lower prism. Close and fasten the prism box when the liquid will be squeezed into a thin film between the prism. Focus the crosswire with the eyepiece, adjust the mirror until the illumination is good, and gently turn the prism box by means of a milled head screw forwards and backwards until a coloured band appears in he field of view. By turning the milled ring at the base of the telescope, a position will be found at which the coloured band will be eliminated, the field of view being partly light and partly dark with a sharp spaniding line. Bring this sharp spaniding line into coincidence with the intersection of the crosswires and read the refractive index or sugar percentage on the spanided arc by means of the magnifier.

The scale is spanided to the third decimal place, the fourth being easily oriented by estimation. It will be noted that the hing of the prism box is so constructed that the lower prism in the box may be removed. For the examination of plastic bodies such as resin, remove the lower prism box, soften the material by heat, and smear a little on the exposed surface of the upper prism, then proced as above. To examine crystals or glasses. A specimen should be prepared, similar in shape to the standard glass test piece provided. Moisten the polished surface of the specimen with the smallest possible quantity of monobromonapthalene and place it upon the suface of the prism with the ground edge directed towards the mirror. Care must be taken to avoid excess of monobromonathalne as this may spoil the definition and confuse the reading. When the correct quantity is used, the specimen will adhere firmly to the prism face.The instrument is sent out carefully adjusted, but it is as well to verify the setting by applying the class test piece to the prism and nothing if the reading is that marked on the piece. I this is not the case, adjust the small squared screw at the back of the telescope with the key provided until agreement is secured. The mean of several reading should be taken if great accuracy is desired.

It is for etermination of heat combustion, calorific value and sulphur contents of solid and liquid fuels. The Bomb body and lid are machined from corrosion resisting stainless steel rod. It's capacity is approxmately 300 m. It is provided with high pressure valve and electrodes. The calorimeter vessel and electrodes. The calorimet vessel/stirrer FHP motor are provided and water jacket as per IP. The bomb Calorimeter is supplied with firing unit, Digital/ Glass Beckman Thermometer, Pellet press, ignition Nichrome wire and pressure gauge with copper pipe fitting.

A. Bomb Calorimeter Apparatus. Glass Beckman thermometer.
B. Bomb Calorimeter Apparatus Digital Beckman thermometer.
C. Bomb Calorimeter Apparatus Digital Beckmen thermometer with Printer.

Optional accessories:
1. Spare Bomb 30 ml. capacity
2. Spare Neoprene washer for Bomb
3. Spare Satinless steel crucible
4. Spare Motor belt.

The infrared moisture balance is an instrument for measuring the moisture content of materials that do not change their chemical structure while losing water under exposure to infrared radiation. This instrument is widely used for testin soils used in construction, agricultural soils, chemical raw materials, foods, pharmaceuticals, plastics and similar materials.
Since drying and weighing are simultaneous the Infrared Moisture Balance is specially useful for determining the moisture percentage in substances that quickly reabsorb moisture after drying. The input power to the infrared lamp can be continuously varied from 0 to 250 watts. As a result greater penetration of heat is possible than in conventional methods.

The balance scale is spanided directly in moisture percentages from 0 to 100% in 0.2% spanisions. A thermometer is provided for estimating the temperature of the drying chamber.