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Home / Biological Apparatus & Material

NEEDLES

Steel for use with needle holder length 40 mm .

SKU: MG-101 Category: Biological Apparatus & Material
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  • To demonstrate that in the absence of atmospheric pull, bodies of different masses and density fall through a given distance in the same time. Comprises a borosilicate glass tube of size 600 x 25 mm, fitted with rubber bung at both the ends, one solid and other with a hole to carry a brass tube and 6 mm diameter rubber tubing for connection to a vacuum pump. A Hoffman clipis used on pressure rubber tubing. Inside the tube is a guinea generally a small coin and a feather. In air, the guinea and the feather fall at different speeds due to air resistance. To show this, turn the tube upside down so both items fall from one end of the tube to the other. The guinea will fall much faster than the feather because it is affected less by air resistance. (The feather has a greater surface area which comes in contact with the surrounding air). Turn the vacuum pump on and expel as much air from the tube as is safely possible. When you have done this, tighten the Hoffman clip and turn off the pump. Inside the tube you should now have a near vacuum. Turn the tube upside down once again and you will see that the guinea and feather arrive at the other end at the same time. With no air in the tube, both objects fall at the same speed as there is no air present (therefore no or negligible resistance) to affect their descent. MS-177 PVG GUINEA AND FEATHER TUBE
  • Oval cross section aluminum case for specimen collection. Hinged door with sliding catch. Strongly constructed, corked inside and anodized outside to prevent rusting. With loops for shoulder straps. With shoulder straps. Size 15 x 4 x 5” length x width x ht. COLLECTION CASES ( VASCULUM )
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PTERIDOPHYTA

(I) Collection of Cereals Includes samples of common types, each in separate circle, displayed in a glass show case of 250 x 350 mm size. (ii) Collection of Pulses Includes samples of 12 common types, each in separate circle. (iii) Collection of Oil seeds Includes samples of major oil yielding seeds. (iv) Collection of Wood types Sample of 12 important types of timbers each of 50 x 25 mm size with nicely finished surface to show characteristic features. (v) Collection of Fiber types Sample of 14 types of vegetative fibres, commonly used in textiles, rope making, paper, brushes, fillings etc. (vi) Collection of Medicinal plants Includes 12 important medicinal plants with their botanical names and important medicinal uses.
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XEROPHYTIC AND PARASITIC PLANTS

Utricularia, Drosera Indica, Drosera Burmani, Drosera Peltata, Pitcher Plant (Nepenthes), Venus Fly Trap.
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LEAF MORPHOLOGY SPECIMENS

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