478 Miscellaneotis Intelligence. 



the extent of four parts in 10,000, and in 2000 feet to the extent of 

 two parts in 10,000, &c. So that from the percentage of carbonic 

 acid we may infer, by computation, the number of cubic feet of 

 fresh air received per hour for each man. Of course an allow- 

 ance is to be made for the amount of air originally contained in 

 "^ , and this is to be determined on obvious principles, 1 



considering the size of the room, the number of its occupants, and 

 the length of time during which it had been occupied by them 

 when the air v/as collected. Dr. Craig describes in detail the 



precautions taken by him to secure accuracy in the use of the 

 methods of determination employed in his experiments, the results 

 of which are condensed into the annexed table. 



Dr. Craig's remarks with regard to the general results of his 

 examinations, that the amount of air which writers on hygiene 

 have held to be the minimum supply consistent with perfect health- 



il7i 

 5 cited the def 

 The amount of good scientific work which has been undertaken 

 ■ogress in connection with the Surgeon General's 



is highly 



ghly creditable to the gentlemen in charge, 

 croscopie labors of Dr. Woodward in connection with the Army- 

 Medical Museum are already familiar to our readers. The enor- 

 mous collections of morbid anatomy and surgery, preserved in the 

 most methodical and orderly manner in the museum itself, are in 

 process of description in many volumes of text with illustrations, 

 parts of which are already issued, b. s. 



2. Reports of the United States Commissioners to the Paris 

 Universal Exposition, 1871. Published under the direction of 

 the Secretary of State, by authority of the Senate of the United 

 States ; edited by Wm. P. Blake, Commissioner of the State of 

 California.— Mention of the various reports included in this series 

 has been made in this Journal, as they have appeared. They have 

 recently been issued in six handsome octav6 volumes. The report^, 

 the work of many able authors, contain a large amount of valuable 

 matter on a wide range of topics, and have been well edited by 31r. 

 Blake. The first volume contains an index to all the reports. 



3. Associations for the Advancement of Science.— "^^ next 

 meeting of the British Association opens at Edinburgh on August 

 2d, and of the American, at Indianapolis, Indiana, on August 1 -^th. 

 Prof. Wm. Thomson is president of the former, and Proi. Asa 

 Gray, of the latter. 



OBITUARY, 



Charles Mayer Wetherill, Ph.D., M.D., died suddenly pj 

 heart disease, on the morning of March 5th, at his residence n 

 the grounds of the Lehigh University, South Bethlehem, Pa. 



Dr. Wetherill was bom in Philadelphia, 4th Nov., 1825, where 

 he graduated with first honors in the University of Penn., " 

 1845. In 1846 he worked at practical chemistry in the l^^J^^^^^l 

 of Booth and Boye, and during 1847 he passed eight months wi 



