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عرض 1666–1680 من أصل 2204 نتائج
Polarimeter
Suitable for determining specific rotation of optically active substances. It has Laurents quartz half shade device which make the system sufficiently accurate and at the same time simple, suitable for use with sodium light. The circular head is attached to the analyzer. Vernier movable over the scale enables reading 0-360° or 0-180°. A 200 mm tube is provided with the instrument. Mounted on a sturdy tripod stand.
SKU: PH30688Polarimeter, Senior
Designed to accept observation tube upto 220 mm length. Its improved rotating half shadow system at the front ensures perfect focus and clear definition. With angular glass scale 0-360º, divided into degrees and reading upto 0.05º with micrometer. A sugar scale from 30º to 120º read upto 0.1 sugar degree. Supplied complete with two polarimeter tubes, 100 mm and 200 mm with dust cover.
SKU: PH30688SPolarising Filter Stress Determination
Demonstrate stress patterns in solids with this new and valuable equipment. Two polarising filters, mounted on a graduated frame are placed on a plastic base. Clear acrylic pieces of different shapes are introduced between the filters; when pressure is applied to the solids the resulting stress patterns are observed. An important method of demonstrating polarisation and stress. Includes instructions.
SKU: PH30642Pooter
For collecting flies, spiders and other small arthropods. Comprises 75 x 25 mm glass tube with inlet and outlet tubes through a rubber stopper. Collecting tube has a flared end and the mouth piece is with rubber tube connection with a gauze filter, to confine collected specimen to the tube.
SKU: B11260Porifera, Coelenterata, Platyhelminthes
All Charts are made on PVC rexine, hand drawn, waterproof, in fast multicolours with a black background. Each chart is provided with rollers to hang on wall. Size 75×100 cm.
1) Phylum Porifera showing sponges of principal types
2) Sycon Development structure & L.H.
3) Obelia structure & Life History
4) Hydra structure & Internal Anatomy
5) Ascaris Internal structure of male & female
6) Tapeworm structure & Life History
7) Liverfluke structure & Life History
8) Hookworm,structure & Life HistorySKU: B13084
