Micrometry. 9 



12. Four numbers of the Bulletin of tJie Museum of Comparative 

 Zoology, Cambridge, Mass. Exchange. 



For the benefit of the country at large, the Society undertook 

 to secure such legislation by Congress as would alter the reg- 

 ulations which exclude slides from the mails. The result has 

 been quite to the satisfaction of microscopists, so far, but it is 

 still uncertain as to the final result, which now depends upon 

 the action of Congress. 



On April 19th, 1878, the Society passed a resolution advising 

 the adoption of the metric system as our standard of micro- 

 scopic measurement. 



For the summer vacation a series of excursions were marked 

 out, but this year they were not well attended owing to several 

 causes. 



At a special meeting called for the purpose, and held July 

 1 6th, it was decided to publish the Transactions of the Society 

 in the Am. Quart. Mic. Journ. The advantages of such an 

 arrangement for the Society are great, for not only will the 

 papers read by members and others be given to the world, 

 either in full or condensed, as may seem advisable to the Com- 

 mittee, but the Society will thus become known to other scien- 

 tific bodies throughout the world, and a system of exchanges 

 can be made of great benefit to all. 



Besides the active members there are six associate and three 

 honorary members. 



MICROMETRY. 



BY ROMYN HITCHCOCK. 



{^Read Sept. 20///.) 



The action of the " National Microscopical Congress," 

 which met at Indianapolis during the month of August, in mak- 

 ing the i-ioo mm. our standard division for micrometry, was 

 a great step towards uniformity in this regard. 



The resolutions there adopted make this society, in a meas- 

 ure, responsible for the final success of the movement, and I 

 have a few suggestions to make as to a proper course for us to 

 pursue. 



The first thing for us to do is to show our concurrence in 

 the action there taken by a resolution, and I offer one as fol- 

 lows : 



