50 G. J. BURCH ON A NEW MICROMETER. 



of a bee's wing as it hovers over a flower — in fact any of the thou- 

 sand and one odd things that are commonly supposed to interest the 

 man of science, maybe determined by this simple arrangement. And 

 I think it not unlikely that it may prove useful to the surgeon, in 

 conjunction with the laryngoscope, as a guide in preparing for an 

 operation. 



During the four or five years that I have had it in use I have 

 found it so handy and useful that I determined to show it to Mr. 

 Curties, and ask his opinion. He at once gave a favourable judg- 

 ment — kindly offered me every assistance and encouragement — (for 

 which I heartily thank him) — and has undertaken, not only to read 

 this paper before you, but also to provide one of the new Micrometers 

 for presentation to your Society. 



I am aware that the very simplicity of this instrument is preju- 

 dicial to it at first sight. There is no mystery of tubes and lenses 

 about it to give it dignity. It looks make-shift rather than scientific. 

 But a little thought will show that it is correct in theory, and a 

 little experience with it will reconcile all who value time and money 

 to its appearance. And I doubt not that, in abler hands than mine, 

 the new principle that it involves will lead to useful, and perhaps 

 more important results. 



