TY - JOUR
AU - Berg, Samuel
AB - 6 4 AMERICAN JOURNAL OP CLINICAL PATHOLOGY permissible for clinical purposes a Mohr pipette may be used. The entire outfit can be assembled at a cost under $15.00. The end point requires a little practice. There is no great difficulty in detecting the difference in shade between the un ­ known and blank . The difference in volume between the blank and unknown does not affect the accuracy since both contain the same amount of ferricyanide at the end point. If, for example, one tube contains twice as much liquid as the other, the concentration of ferricyanide in it will be half as much as in the other. However, the depth of fluid under observation will be twice as great and these two effects cancel each other. It is for this reason that flat bottomed tubes are used. The wax cup is prepared by pouring melted paraffin into the depressions of a muffin tin. When the wax solidifies, the shrink­ age produces a concave surface on which the blood can be caught. The blood does not clot readily on th e wax. I wish to express my gratitud e to Hoffman-LaRoche, who kindly furnished the tablets. REFERENCE S (1) 
TI - Simple Apparatus and Technique for Gas Analysis*
JF - American Journal of Clinical Pathology
DO - 10.1093/ajcp/9.2_ts.64
DA - 1939-03-01
UR - https://www.deepdyve.com/lp/oxford-university-press/simple-apparatus-and-technique-for-gas-analysis-Avp9hv00pk
SP - 64
EP - 68
VL - 9
IS - ts3_2
DP - DeepDyve
ER -