Scrupulously Clean Test Tubes

Numerous devices have been advocated for the maintenance of scrupulously clean test tubes. Dr. Richardson has tried them all. The best method is to break up all dirty equipment and throw it away hoping that the new equipment will be free from enzyme inhibitory compounds. This proved expensive so a study of the various washing compounds was made. DUZ does everything and DID has done everything but is all washed up. A study of the alcohols was made, the lower ones both externally and internally. When the internal system was used a certain carefree attitude developed about the glassware but still the little enzyme was unhappy. Finally success crowned the efforts. The sulfonated higher alcohol was tried. Beautiful sparkling glassware resulted and at last little Urease was contented.