129 



Every time the left pan closes its circuit a portion of the current 

 passes through the magnet of a recording pen, marking on a 

 revolving drum. The wires with which the mercury cups make 

 contact can be raised or lowered, thus varying the interval at 

 which the marks are made. The movement of the balance is 

 steadied by means of a disc fastened beneath one of the pans and 

 moving up and down in a heavy liquid. A number of records 

 can be traced simultaneously on the drum, so that it is possible 

 to set up two or more plants under different conditions, together 

 with an evaporimeter beside every plant and automatically 

 record the water loss from each on the same drum. The appar- 

 atus is obtainable from Messrs. Baird & Tatlock, Cross Street, 

 Hatton Garden, London, E.C. 



It is perhaps asking too much that the fashioners of a beautiful 

 piece of apparatus should also present a handsome series of 

 results obtained with their invention. Yet it is difficult to repress 

 altogether a feeling of resentment in viewing the one puny record 

 contributed by the authors. W. G. M. 



PROCEEDINGS OF THE CLUB 

 February io, 1914 



The first meeting of the Club in February was held February 

 10, 1914, at the American Museum of Natural History at 8:15 

 P.M. President Harper presided. Twenty-four persons were 

 present. Mr. Charles Van Loan's resignation was tendered to 

 the Club and accepted. 



President Harper asked for permission to appoint a series of 

 special committees to study the Cryptogamic flora of the vicinity 

 of New York. Vice-President Barnhart then took the chair and 

 opened the matter for discussion. Dr. Howe made a motion to 

 grant President Harper the permission requested. The motion 

 was unanimously carried. 



The business program was then followed by an illustrated 

 lecture on "The International Phytogeographical Excursion of 

 1913/' by Dr. George E. Nichols. Dr. Nichols will publish a short 

 account of the Expedition in Torreya for April. 



Meeting adjourned. Michael Levine, 



Sec. pro tern. 



