Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 374
fitted into thefork at the top of the tube F. By turning the nut K the spring iis elevated and depressed, giving nice adjustment to the needle n incase the finger is to be attached to a microscope, not having rack-movement to the cap b, to bring the end of tlie hair and the objectin close… … 336 Mechanics, Physics, and Cliemistry. cork facilitates the adjustment of the liair to the proper inclina-tion, A slight pressure on tlie button L brings down the hair, andthe spring, inside of F, instantly lifts it again when the pressure isremoved. The tube F turns in the clamp d in order to…
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