Excerpt from The Practitioners Guide in Urinalysis Never stand a test-tube in a cup, glass or beaker, but always in the rack. To clean the tubes pour out the liquid contained in them, if any, rinse out with water, which if possible should be warm, then filling half or two-thirds full of water introduce the test-tube brush and work it to and fro carefully push ing it down to the very end of the tube. After the tubes have been washed they should be inverted over the pegs in the rack to dry. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.