io8 Associations and Societies 



members of the society. A certificate was read for the first time in 

 favour of Mr. Frank Theodore Alpe, " Bracondale," Wymondham, 

 Norfolk. Certificates were read for the second time in favour of 

 Messrs. Thomas John Hitchcock, and Nelson Trafalgar Foley. 



Abstracts of the papers that were read are appended. 



Note on human milk: G. D. Eisdon, B.Sc, F.I.C. Results 

 of analysis, including data for the fatty portion, were given for two 

 samples of milk taken on two successive days from the same source. 

 A table of figures was included for 146 samples of human milk, 

 6y of which were fully analysed, and 79 partially. 



Notes on common processes used in water analysis: W. T. 

 Burgcss, F.I.C. The author called attention to the several details 

 in ordinary processes, neglect of which causes unexpected errors in 

 the determinations; he also dealt with the care of laboratory glass 

 apparatus. 



He stated that the green growths in condensers, which so often 

 disfigure our laboratory benches, could be almost entirely prevented 

 by the simple expedient of inserting a long helix of fine and bright 

 copper wire in the water-jacket, the trace of copper taken up by the 

 water being sufificient to inhibit the development of the algse. 



The author said that he had reasons for believing that the 

 "nitrometer" method of estimating nitrogen was not in such gen- 

 eral use as its excellence warranted, and exhibited a slightly modi- 

 fied apparatus in which the determinations could be made with ex- 

 pedition. The ordinary measuring tube with single-bore stopcock, 

 is fitted with a large rubber " cork," of a size sufficient to take a 

 short length of wide glass tubing which can, when required, be 

 slipped over the stopcock and the graduated part of the tube. The 

 pressure tube is carefully selected so that its internal diameter is 

 exactly the same as that of the measuring tube. The NO is liber- 

 ated in the usual way, and when the action is completed the pres- 

 sure tube is clamped so that the level of the mercury is about 40 mm. 

 below that in the measuring tube. A few drops of distilled water 

 are then allowed to enter the measuring tube; this water remains 

 on the top of the turbid, acid, mixture and permits the meniscus to 

 be seen clearly. The wide glass tube is then slipped on the cork 

 and filled with water, and after a few minutes the volume of gas 



