Society of Aiis. 231 



relative to what Mr, Brown had been supposed to have said or im- 

 plied. 



Feb. 20. — Mr. Ainger resumed and completed the considerations 

 relative to pendulums, which he commenced in the last season- 

 upon this occasion considering principally the variation of time in 

 the vibrations dependent upon the difference in extent of the arcs 

 through which the pendulum passed, and also the variations pro- 

 duced by temperature. The corrections for both these were ex- 

 plained and illustrated. 



SOCIETY FOR THE ENCOURAGEMENT OF ARTS, MANUFACTURES 

 ANO COMMERCE. 



We feel pleasure in giving additional publicity to the following cir- 

 cular, addressed to the Members of the Society of Arts, by the Secre- 

 tary to that useful Institution. 



The Society of Arts having taken into consideration the advantages 

 that would probably accrue from occasional meetings for disserta- 

 tions on subjects connected with the Arts and Manufactures of the 

 country, illustrated by ancient and modern specimens, has determined 

 to appropriate to this object Seven Evenings during the present Session 

 Ancient and modern Pottery and Porcelain have occupied the first two 

 evenings ; and the subjects proposed for illustration on the others 

 are, the Arts of Stereotype Founding and Printing, and of Casting in 

 Plaster of Paris, and the manufactures of Glass and of Paper. The 

 preparation of the Essay to be read on each evening has been con- 

 fided to the Secretary, who will be happy to receive either written or 

 verbal communications illustrative of any of the above subjects. 



It is evident that much of the interest and instruction expected 

 from the proposed meetings, will depend on the abundance and qua- 

 lity of the specimens by which each subject shall be illustrated. Ap- 

 plications have already been made to several individuals, both in and 

 out of the Society ; and the uniform liberality with which they have 

 been met is a gratifying proof of the interest taken in the plan, and 

 a presumption that other members of the Society will be equally' will- 

 ing to contribute curious and interesting specimens, either directly 

 or more remotely connected with the top'ic of each evening's discus- 

 sion. The Special Committee of Chairmen, to whom the details of 

 the arrangement have been intrusted, request that such members as 

 are disposed to contribute information or the loan of specimens, will 

 notify thosame to the Secretary at their earliest convenience, in order 

 that measures may be taken by which, with the least inconvenience 

 to them, the Society may in the most advantageous manner avail 

 Itself of their liberality. The Society will also feel obliged by the loan 

 of any articles that will add to the interest of these meetings ; cha- 

 racteristic specimens of natural substances, especially of those that 

 form the raw materials of the arts and manufactures 'of the country, 

 tools, instruments, and models of machinery, samples of new and 

 beautiful fiibrics, fine works of art, books, and prints, will be parti- 

 cularly acceptable. It is requested that all such articles may, if pos- 

 sible, be sent the day before the meeting, in order that they may be 

 properly arranged. 



XXXV. In- 



