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عرض 1111–1125 من أصل 2204 نتائج
Flexible Arm Illuminated Magnifier
A 130 mm diam lens and a 22 watt circular tubelight mounted around the lens, are mounted on a spring balanced stand with feather touch movement and a reach of 900 mm.allowing the lens to be placed in any position and keeps both the hands free.An ideal aid to fine assembly work,quality control and inspection. With a spot lens to increase magnification from x 2 to x 3.5. Field of view 230 mm,working distance 250 mm
SKU: B10890Flower & Embryology
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) Typical flower showing parts
2) Fertilization showing germination of pollen
3) T.S. Anther & its development
4) Germination of pollen grain and development of male Gametophyte
5) Megasporogensis
6) Development of embryo and endosperms
7) Development of embryo in sagittaria
8) Embryo in Capasella
9) Microsporangium
10) Types of emchryo sacs
11) Forms of Androecium
12) Form of Gynaecium
13) Development of Monocot embryo
14) Placentation
15) Aestivation
16) L.H. Datura
17) Inflorescene Part – I showing simple racemose & simple cymose
18) Inflorescene Part – II showing compound & special
19) Pollination different types
20) Foms of ovules
21) Foms of Calx & corollaSKU: B13128Force On a Conductor Balance
To demonstrate that when a current is passed through a conductor in a magnetic field, it is subjected to attraction or repulsion depending upon the direction of current in it. The apparatus consists of a plastic base 160 x 140 mm on which two contact pillars are mounted. Each pillar is provided with an external circuit. A balanced beam is supported by the pillars on two bearings which form the fulcrum. Two screwed masses are provided in the beam system, one moving vertically for the adjustment of sensitivity and the other moving horizontally for the adjustment of the equilibrium position, when no current is flowing. Scale marked 0 to 75 x 1 mm, rider of 1 gm. weight, with instruction manual.
SKU: PH41172Force On a Conductor In a Magnetic Field (Laplace Law)
To demonstrate the electromagnetism. A pair of powerful magnets in U shape holder. A pair of brass rail with 4 mm socket is used for demonstration. A brass axle with two plastic discs is free to roll along the rails and complete the circuit between rails. As the axle placed on the rails near the poles of magnets and power supplied to the rails, the axle repelled and rolls away from the center of magnetic field along the rails.
SKU: PH41170
