526 TRANSACTIONS OF THE AMERICAN INSTITUTE. 



contrary. It is a subject we should discuss more fully than time would 

 allow this evening; I would, therefore, suggest that it be continued as the 

 subject for the next meeting. 



Mr. Thomas Godwin made diagrams on the black board showing Lowber 

 and Leroy's method of making tin-lined pipe, and also Mr. Ewbank's mode 

 of tinning lead pipe, which was simply a shallow ladle filled with melted 

 tin, and a little rosin being placed in the opening of the pipe to be tinned, 

 it was drawn though the -melted tin and coated it but not perfectly, as Mr- 

 Godwin said he had stripped many feet of the tin at a time, and this was 

 also the case with Lowber and Leroj^'s system. 



Mr. Lang made a drawing of Lowber and Leroy's method of lining lead 

 pipe; he said he had worked at it for seven years, and that they did not use 

 pure tin but an alloy of tin and lead, as pure tin melts at a higher tempe- 

 rature than the alloy; by their process the lead pipe would be melted by 

 using pure tin. 



Mr. Garvey. — There can be no doubt but that we have here a very beau- 

 tiful and simple process for coating lead pipe with tin, not like the other 

 processes described here which may tin in some places and not in others, 

 but what is most needed would appear to be the exact temperature which 

 is recessary in order to effect a perfect union of the two metals. The 

 specimens of tin-lined pipe which we have here are the most perfect pieces 

 of workmanship which I have ever seen of the kind. 



The subject of conveying water through lead pipe was continued for the 

 next meeting. Adjourned. 



American Institute Polytechnic Association, ) 

 December 10, 1863. ) 



Chairman, S. D. Tillman, Esq.; Secretary, Mr. B. Garvey. 



Gold Mines. 



Dr. R. P. Stevens. — Mr. Chairman, one of the most important discoveries 

 within the last six months has been made in the exploration of the gold 

 fields on this side of the Atlantic, which, from present appearances, will 

 rival that of California. It has long been known that on this part of the 

 continent of America, gold has been found in the streams running through 

 East Canada, but the reports of Canadian geologists have been so favorable 

 that companies were formed in this city and other places to work them, 

 and parties have been sent there expecting to find the gold in even greater 

 quantities than represented. However, within the last year, gold has been 

 found in St. Francis and in several other counties, and the indications are 

 that it can be had in reliable quantities all over the country. There is no one 

 local supply which is peculiar to one place, but very extensive deposits are 

 found from lake Champlain to the bay of New England. The surface of 

 these deposits forms some of the most beautiful country on the American 

 continent, abounding in charming scenery. There are some incidents con- 

 nected with these surveys which resulted in the discovery of this gold, 

 that may be alluded to, for instance : Our city fathers, in 1810, decided to 

 build the old city hall, and they appointed a committee to select the proper 



