OF ARTS AND SCIENCES. 31 



requires a certain continuous solution of the sheathinff metal, in view of 

 the present enormous consumption, this subject has economical bearings 

 of great importance. It is probable that an alloy, forming part of a 

 mixed metal, might be found, less positive in its relation than the one 

 removed from yellow-metal, and yet sufficiently oxidizable to preserve 

 the surface clean while the vessel is in motion. Such an alloy united 

 to brass would present the mechanical require«i,ents, in union with a 

 chemical resistance called for, in sheathing metals." 



Professor W. B. Rogers gave an account of his experiments 

 on the production of sounds by flames within glass tubes, 

 and explained the principle of their formation. 



Professor Felton alluded to the newly discovered process of 

 Photo-lithography, which had been announced to the Academy 

 by Dr. W. F. Channing at the previous meeting, and sug- 

 gested that it offered an admirable method for the reproduc- 

 tion of the inscription on an ancient papyrus in Dr. Abbot's 

 Egyptian collection. He had spoken to the inventors of the 

 process, and the plan of reproducing it in this way seemed 

 to them quite practicable. If it could be done, this would 

 be the second inscription of that kind which had ever been 

 published. 



Dr. Channing said he had no doubt the inscription could 

 be lithographed by this process at a moderate cost, and moved 

 that the Publishing Committee take into consideration the 

 expediency of thus bringing before the scientific world this 

 interesting papyrus. The motion was seconded by Professor 

 Felton, and adopted. Dr. Channing was added to the com- 

 mittee for this purpose. 



Four Iiuudred and fiftieth meeting. 



April 13, 1858. — Monthly Meeting. 



The Academy met at the house of Hon. C. F. Adams. 

 The President in the chair. 



A letter was read from Mr. John Akhurst, of Brooklyn, N. Y., 

 dated March 30, offering to forward to the Academy certain 



