280 [December. 



forces on a bolt, comparison of load per square inch with friction, 

 torsion, combined torsion and tension, strength of nuts, &c. &c. The 

 above gives the result in the more striking and important par- 

 ticulars. 



Dr. Wood having requested Judge Sliarswood to take the 

 chair, gave a sketch of the water-works of Madrid. Mr. 

 Fraley discussed the subject of an increased supply of water 

 for the city of Philadelphia, advocating the construction of 

 additional reservoirs at various points on the Schuylkill 

 Heights, to be filled from the river by steam-engines. Mr. 

 Trego followed with remarks on the same subject, and Dr. 

 Hays with others, upon the degree of purity of the river 

 water. 



The Treasurer's annual report was read and referred to the 

 Finance Committee. 



The Publication Committee presented their annual report, 

 as follows : " Since the last report, Part Three (3) of Volume 

 XII has been printed and distributed. The number of sub- 

 scribers has not materially altered during the past year. The 

 amount received from subscription to the Transactions has 

 been in excess of last year ; nevertheless the arrears due are 

 on the increase. The amount paid on publications for the 

 past year is fourteen hundred and thirty dollars and fifty-three 

 cents ($1480 53), of which nine hundred and eighty-six dol- 

 lars and ninety-two cents ($986 92),* was on account of the 

 Transactions for the last and previous numbers. The receipts 

 amount to one hundred and fifty-two dollars and ninety-two 

 cents ($152 92)." 



The report was accepted, and the Society was adjourned. 



* Viz., $.354 02, cost of Part III, Vol. XII. $632 90, see report Oct. 25th, 1802. 



