302 PROCEEDINGS OF THE AMERICAN ACADEMY 



Messrs. Edward Desor and Charles Jackson, Jr., were elected 

 Fellows of the Academy. 



Professor Spencer F. Baird, of Carlisle, Pennsylvania, was 

 elected a Corresponding Member. 



Three hundred and fifth Meeting. 



February 1, 1848. — Monthly Meeting. 



The President in the chair. 



Professor Horsford read extracts from a letter from Professor 

 Liebig, commmiicating the results of some experiments made 

 with a view to determine the permeability of membranes to 

 air, water, and various solutions. He has arrived at the con- 

 clusion, that the secretions from the blood-vessels and alimen- 

 tary canal are directly produced by the evaporation from the 

 skin and lungs, on the one hand, and the pressure of the at- 

 mosphere on the other. 



Professor Horsford also made the observation, that chloro- 

 form, and several other compounds which taste sweet, may 

 be written in the list of the various sweet bodies enumerated 

 in his paper upon Glycocoll. To illustrate this he presented 

 the following formulae : — 



" Siveet Bodies. 



C,2 H,o 0,0 = Milk Sugar. 

 Ci2 Ha Oil = Cane Sugar. 

 Ci2 Hi2 Oi2 = Grape Sugar. 



article. As soon as a second observation is made, it must be communicated in 

 like manner with tlie first, and with it the longitude of the place where the dis- 

 covery is made, unless it take place at some known observatory. The expecta- 

 tion of obtaining a second observation will never be received as a satisfactory 

 reason for postponing the communication of the first. 



6. The medal will be assigned twelve months after the discovery of the comet, 

 and no claim will be admitted after that period. 



7. Messrs. Baily and Schumacher are to decide if a discovery has been made* 

 If they differ, Mr. Gauss of Gottingen is to decide. 



8. Messrs. Baily and Schumacher have agreed to communicate mutually to 

 each other every announcement of a discovery. 



Altona, April, 1840. 



