208 Scientific Intelligence. 
blackened. The washing should be done when we perceive that 
grey and black spots are forming. For this purpose, river water is 
used, or better still, distilled water slightly acidulated either with vin- 
egar or with one of the acids which enter into the above mixtures, in 
the proportion of a spoonful of acid to a litre of water.—Ann. de D’In- 
dustrie Nat. Avril, 1820.—Translated and abstracted by the Editor. 
24. Albany Institute—tIn our No. for April last, we quoted at 
length, from the first number of the Transactions of the Albany In- 
stitute for June 1828, an interesting paper on the variation of the 
magnetic needle, including a very important document, shewing the 
rate of the variation at Boston, Falmouth, and Penobscot, for one 
hundred and twenty eight years, and which would alone have given 
importance to the number, had the other communications in it been 
less valuable and interesting than they were. Their titles are 
_ On the luminous appearance of the Ocean, by Lt. T. R. Ingalls. 
Qn the Geographical Botany of the United States, Part I. by Dr. 
L, C. Beck 
. On some mebeineions of the electro-magnetic apparatus, (with a 
plate) by Prof. Henry. 
The Institute has, the present summer, (1829,) published a second 
mabe, conning valuable papers, of which ~ following are the 
News on Mr. Pickering’s “ Vocabulary of Words and Phrases, 
which have been supposed to be peculiar to the United States,” with 
observations, by 'T. R. Beck. 
On the Uvularia grandiflora, as a remedy for the bite of a Rattle- 
snake, by J. G. Tracy. 
An examination of the question, whether the climate of the valley 
of the Mississippi, under similar parallels of latitude, is warmer than 
than that of the Atlantic ocean, by L. C. Beck, M. D. 
" Observations on the Geological features of the south side of the 
Ontario valley, in a letter to T. R. Beck, M. D., by J. Geddes, 
Civil Engineer. 
An appendix contains the Charter of the Society, for the promo- 
tion of useful Arts, and of the Albany Lyceum of Natural History; 
which i institutions have been united to form the Albany Institute. 
The y valuable papers which have been already published, are in a¢- 
ce ah the can the Institute, to embrace both “ Science 
ae ‘ 
