Notices respecting New Books. 391 



has been considered by some in a point of view distinct 

 from ihat of arches, and indicated by the sufjposltions, that 

 the arch is most apt to spHt in the middle between the im- 

 post and the key-stone; that the superior vaiissoirs above 

 this point of fracture are bound together, forming one 

 vaussoir or one wediie ; and that the lower vaussoirs are So 

 attached to theabulnienl pier, that they also form one stone, 

 liable to revolve on the external lower angle of the pier, by 

 the action of the upper part of the arch, involvinu the jouit 

 action of a wedge or inclined plane, and lever. The same 

 principles are applicable, wherever the joint of splitting may 

 be considered to be. 



[To be continued ] 



LXXI. Notices respecting New Books. 



Extract from a Paper entitled ^^ The Result of Eleven 

 Years Practice at the Original Faccine Pock Institution, 

 No. 41, Broad Street, Golden Square," &c. 8vo. pp. 46. 

 Printed by Reynell, 1811. Sold at the Institution. 



JL he public must feel much interested by this publication, 

 containintT the results of the practice of vaccination for a 

 longer period distinctly than any other institution of a si- 

 milar kind. Besides, the medical establishment being per- 

 fectly independent of any pecuniary remuneration, but on 

 the contrary supporting the Institution chiefly at their own 

 expense; ttiey are not likely to be warped in their judge- 

 ment, nor to be tempted tn give unwarrantable or exagge- 

 rated accounts to answer private views. It is well known 

 too, that this Society has hefi.n the first to make the public 

 acquainted with the defects of vaccine inoculation, as well 

 as with its advantages. 



After a brief but very condensed history of the new ino- 

 culation, and a more particular account of their Establish- 

 ment, in which mention is made of their own attempts to 

 investigate the laws of agency of 'vaccine matter, the au- 

 thors relate the more remarkable results of their practice. 

 They desire to be considered as merely giving evidence, and 

 distinctly disclaim any interference with the opinions or 

 facts asserted by others. For many of these particulars, 

 we refer to the pamphlet itself; but certainly they feel re- 

 sponsible for the lacts asserteil, however great may be their 

 discrepancy from those of other Reports. We shall notice 

 a few of these facts. 



Matter taken oarlv, i. e. before the Qth day, is more effi- 

 B b 4 cacious 



