344 HINTS ON SHAVING. 



water in the principal tube mnst have an undulating motion^ 

 which will make the velocity difficult to be accurately ascei-- 

 tained. 



Now let us suppose the upper orifice of the trumpet- 

 mouth tube to be precisely on a level with the water in the 

 other, and placed in a tub or receiver ; when the vessel gets 

 way, the water will rise and flow over, and be caught by the 

 receiver. Now, Sir, I would suppose, that the area of the 

 orifice being exactly found, the space of time in which the 

 water received was flowing in being exactly noted, we might 

 find the velocity of the boat much more accurately (in the 

 above-mentioned circumstances) than by the original method 

 ofM. Pitot. 



As far as I have read, or inquired, I did not find this method 

 proposed by any one. I now submit it to you, assuring you^ 

 Sir, that I am 



Your most humble servant, 



31, DominicJc-strect. H. HAMILL, Jun. 



xr. 



Facts relating to the Art of Shaving. From a Correspondent , 



JlJlAVTNG noticed some useful hints in your Journal, on the 

 subject of razors, and their best state of application, I am de- 

 sirous to contribute one or two observations, to add ease and 

 comfort to their use and operation. 

 Instructions In the preparation for shaving, I have found it the better 



for shaving, mode of applying lather in a thicker state than is usually done, 

 and for prepar- .„,.,,. ,, , . i ir j ^i 



mgthe i-azor. or if laid on thm, to allow it a tew seconds to halt dry on the 



face ; and, in either case, to r"ib or brush well into the roots of 

 the hair, by the hand, or by a brush of some hardness, which 

 gives a very useful and moderate resistance to the operation of 

 the razor. In this last article, too, I reverse the common prac- 

 tice, which is to prepare the razor before sitaving; on the 

 contrary, I have found it best, from repeated and long experi- 

 V cnce, to strop it after shaving, and lay it up in that state. It 



th«n 



