10 On the Photographic delineation [No. 9, nevt seihei. 



position it pronounces the dental ' t* (,#). There remains a posi- 

 tion midway between these two extremes, namely, the line where 

 the palate meets the roots of the front teeth : this appears to be 

 the proper ' birth-place' of our letter p ; and if so it may conse- 

 quently perhaps not unaptly be assigned the power of a cerebro- 



DENTAL ' t.' 



"Whether the letter in question ever had in popular usage the 

 pronunciation here claimed for it as its true power, this paper 

 does not profess to enquire ; much less to decide on the one side or 

 the other : nor is it intended to express even the whisper of a 

 wish to alter in any way the present popular articulation of the 

 letter. Its sole object has been to endeavour to solve an apparent 

 anomaly in this remarkably regular language, and to ascertain the 

 true place of the letter p in the classification of the Tamil alpha- 

 bet. It is sufficient if a probable case has been made out in sup- 

 port of the position that, philosophically regarded, this letter is to 

 be classed as a cerebro-dental ' t.' 



II. On the Photographic delineation of Microscopic objects. By 

 Lieut. J. Mitchell. 



I was requested at our last meeting to write a paper on this sub- 

 ject. It is not, I fear, one of very general interest even to Photo- 

 graphers, and I perhaps ought to apologize for troubling you with 

 it. It may however, as suggested by Colonel Hamilton, serve to 

 induce others to give us the benefit of their experience, and if so 

 my labour will not have been altogether useless. 



The subject is not a new one, a paper by Mr. Joseph Delves, 

 " On the application of Photography to the representation of Mi- 

 croscopic objects," having been communicated to the Microscopi- 

 cal Society of London in October 1852, it will be found in the 

 transactions of that Society for 1852-53. This was followed by a 

 paper from Mr. G. Shudbolt, a well known Microscopist and Pho- 

 tographer, " On the Photographic delineation of Microscopic ob- 

 jects by artificial illumination," and by another from Mr. S. High- 



