Tube, test
Test Tube. Material: glass. Size: 3/4" diameter x 5" H. Description: clear glass tube open at top; labeling area etched on side.
Waseca City Business - Fowler's Dairy. Creamery. Dairies used chemical equipment for milk analysis to ascertain milk specific gravity and to identify milk components of water, fat, casein and albumin, milk sugar and ash.