General experiment

High quality small size general board for experiments, board with individual copper per hole for quick fabrication and testing. Board size 43 mm x 56 mm 0.1 inch hole spacing Matrix 15 x 21

High quality medium size general board for experiments, board with individual copper per hole for quick fabrication and testing. Board size 86 mm x 56 mm 0.1 inch hole spacing Matrix 32 X 21

High quality large size general board for experiments, board with individual copper per hole for quick fabrication and testing. Board size 86 mm x 111 mm 0.1 inch hole spacing Matrix 32 X 43

High quality extra large size general board for experiments, board with individual copper per hole for quick fabrication and testing. Board size 86 mm x 169 mm 0.1 inch hole spacing Matrix 32 X 65

we 'national Scientific Apparatus Works' Offering Our Customers National Tuning Fork Set Of 8 Welch Type. The Welch Type Tuning Fork Are Intended For Student Use And For General Experiment Work. Welch Type Tuning Fork Often Selected For Student Use And Preferred For Laboratories Standards And For Applications Requiring Longer Duration Of Vibrations. Set Of 8 Tuning Fork Marked With Its Number Of Vibrations. 256c 288d 320e 341f 384g 426a 480b 512c Large Tuning Forks. The Accuracy Of Fork Is Adjusted Considerable Care By Skilled Technicians. Supplied In Velvet Box