THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS, 



CONDUCTED BY 



Prof, B. SILLIMAN and B. SILLIMAN, Jr 



OF TALE COLLEGE. 



This Journal embraces in its plan, the entire circle of the Physical Sciences, 

 and their applications to the arts. It was begun in July, 1818, and the forty third 

 volume is now completed. 



While it has prompted original American efforts, it has been sustained by them ; and 

 being devoted to important national and universal interests, it is in that character 

 known and accredited, both at home and abroad. It has elicited many valuable re- 

 searches and discoveries; its miscellaneous department has presented a great varie- 

 ty of topics of general interest ; and a large part of the work is quite intelligible to 

 the reading public. 



Avoiding local, personal, and party interests and prejudices, it foregoes the support 

 of popular feeling, and relies solely upon the intelligent and the patriotic. 



The Foreign Journals, (many of them sent in exchange,) often quote from its 

 pages, which are in turn, enriched by theirs; and it has thus become identified with 

 the Science and Arts of the present day. 



The American Journal of Science and Arts is published quarterly at New Haven, 

 Conn. Each number contains at least 200 pages, closely and handsomely printed on 

 good paper, and fully illustrated by engravings. The subscription is $6 in advance, 

 by mail. The extra dollar beyond the usual price of the literary quarterlies is in- 

 dispensable, on account of a more limited patronage, and the great expense of en- 

 gravings. 



Remittances should be made, if possible, in Eastern money, but if that cannot be 

 obtained, the best bills which can be had may be substituted. 



Subscribers will remember the regulation of the Post-Office department, by which 

 Postmasters are authorized to remit payments for periodicals free of postage, if 

 the letter containing the remittance is subscribed by themselves. 



POSTAGE PAID. 



The postage is paid by the Editors on all copies sent directly from them by mail, 

 to subscribers whose accounts are not in arrears. Their object in this arrangement, 

 is to place those persons who cannot take the work through an agent, and therefore 

 free of charge of transportation, on the same footing in this respect with city sub- 

 scribers. Subscribers by mail have heretofore paid from $1 to $1 37£ per annum 

 for postage, which has been a sufficient consideration to induce many to decline 

 taking the work. Now this objection is removed, upon the simple condition of 

 punctual remittances. This plan has been in operation since January, 1841, and 

 has already had the effect of increasing the number of subscribers to the work, and 

 also of rendering all more attentive to the condition of their accounts, that they 

 may avail themselves of the free postage, as the Editors strictly adhere to their 

 rules of paying no postage on Nos. sent to those who are in arrears ; and they 

 make no apology to their present supporters and contributors, for asking their as- 

 sistance in aiding them to sustain this experiment, by making this notiee more pub- 

 lic, and inducing their friends to subscribe. 



Experience has proved that the mail is by far the best means of conveyance to 

 distant subscribers — the most sure and most speedy; and all attempts to establish 

 agencies at a distance, and away from the great lines of transportation have utterly 

 failed — delay and dissatisfaction, and often abandonment of the work, being the result. 



Sew Haven, Conn., March 26, 1842. 





