DECEMBER, 1953
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623
TYGON BULBS FOR MEDICINE DROPPERS JOHN I. MARGRAVE University of Wisconsin, Madison, Wisconsin
end was sealed by heating with an ordinary soldering iron fitted with a special tip designed to hold the tubing tightly closed while being heated. Droppers fitted with bulbs of this type have given good service in our student laboratories when used with a variety of common laboratory reagents-dilute and concentrated
