204 Address of the President. 



two clays ago, I regret that I have not yet had an oppor- 

 tunity of fully testing their value. I may state, however, 

 that I have tried the form of lever first described with com- 

 plete success on the dead subject, and the two molars which 

 I now exhibit, and which are of unusual size and strength, 

 may be taken as an illustration of the power of the lever and 

 of the success of the principle. I have to apologise for 

 reading a paper before the Institute which is in so many 

 respects imperfect, but I felt unwilling to delay the descrip- 

 tion of my instrument until after the vacation. 



It sometimes happens that there are inventions of which 

 we may fairly predicate success, without waiting for the 

 results of experience ; I believe that this invention is one of 

 these, and I cherish the hope that it may be the means 

 both of greatly lessening the difficulties, that are frequently 

 met with in the extraction of teeth, and of mitigating the 

 sufferings of those who are compelled to submit themselves 

 to this disagreeable operation. 



[Explanation of Plate.] 



Table I. represents the instrument described above. 



Since the reading of the paper, an important improvement has suggested 

 itself to the Author in the construction of the instruments shown in Table I., 

 and Table II. sufficiently explains the alterations made. In both Plates the 

 figures are nearly half the real size. 



Art. XXI. — Address of the President, Ferdinand Mueller, 

 M.D., Ph.D., F.R.G. & L.S., &c, &c. 



[Delivered to the Members of the Instittite at the Inauguration of the 

 Hall, January 23rd, I860.] 



Gentlemen — 



In the development of social as well as political institu- 

 tions, events occur of significant importance from which 

 the historian dates new epochs, or which the . citizen 

 points out as the inauguration of new eras. Such an event 

 has on this occasion arisen to our Institute — that moment 

 from which our existence as a scientific union may be re- 

 garded as perpetual, and its labors as consolidated. More 

 fortunate than many other scientific associations, we have 



