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Square shape, of thick iron gauge wire, for noting population surveys on flat terrain. Side length 100 mm.
Home / Biological Apparatus & Material

QUADRANT IRON

  • A 205 mm square metal plate with 200 mm round alternating black and white quadrants for estimating the turbidity of water in ponds, rivers etc. The plate is lowered into the water until the black and white quadrants can no longer be differentiated. Depth is noted and then the plate is raised until the quadrants can just be differentiated. Depth is again noted. The mean of two depths is taken as an index of relative turbidity. Cord supplied with the plate can either be knotted at 0.5 m interval or some colored markers can be tied for noting the depth.

Square shape, of thick iron gauge wire, for noting population surveys on flat terrain. Side length 100 mm.

SKU: MG-78 Category: Biological Apparatus & Material
  • A 205 mm square metal plate with 200 mm round alternating black and white quadrants for estimating the turbidity of water in ponds, rivers etc. The plate is lowered into the water until the black and white quadrants can no longer be differentiated. Depth is noted and then the plate is raised until the quadrants can just be differentiated. Depth is again noted. The mean of two depths is taken as an index of relative turbidity. Cord supplied with the plate can either be knotted at 0.5 m interval or some colored markers can be tied for noting the depth.
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  • MA-22 SET OF 45 ROCKS PVG INTERNATIONAL’Soffers excellent collection of Rocks,Minerals and ores used as teaching aid for beginers or in advance stage of studies. Collection of 45 Rocks in Wooden Box with 45 Big Specimen Set of Rock Igneous ,Sedimentaryand Metamorphic Rock with 15 specimens as the representative of each type of rock. Igneous rocks which are formed when magma or lava cools and solidifies. gneous rocks are fire-born, meaning that they are formed from the cooling and solidification of molten (melted) rock. Sedimentary rocks are formed from the accumulation of weathered rock fragments, organic matter, or minerals in layers. These layers are then compacted and cemented together to form rock. Metamorphic rocks are formed when igneous and sedimentary rocks are subjected to high temperatures and pressures, causing them to change form. Common sedimentary rocks include sandstone, limestone, and shale. These rocks often start as sediments carried in rivers and deposited in lakes and oceans. When buried, the sediments lose water and become cemented to form rock. This is an ideal collection for the Study of Earth Stones for Geologists, educationists to teach students and for classroom use for all earth science studies. This rock collection for classrooms is the perfect educational tool to help engage students in a hands-on way. Clearly labelled and affixed to sturdy cardboard  or wooden backing with polished wooden box having front glass. MA-22 ROCK SET
  • Comprises a borosilicate glass U tube with 225 mm. height, with each limb graduated 0-120 x 1 mm. Bend fitted with a filling tube and stopcock. Two platinum electrodes 14 mm. diameter can be adjusted at any position by locking PM-892 PVG TACHO METERS (RPM METERS)
  • Mounted in glass tubes, with 4 mm. sockets to take plug leads. Cat. No. Type 891.01 Copper Rod 891.02 Copper Plate 891.03 Zinc rod 891.04 Silver wire short 891.05 Silver wire long 891.06 Platinum wire 891.07 Platinum foil 891.08 Gold foil PM-891 PVG ELECTRODES
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