148 TALLOW LAMP. 



pefcription of a incrcafe in the current of air which paffed the flame, ren- 

 tallow^ "'^"'"^ ^^rcd it fomewhat more bright, and confiderably more fteady. 

 This part is reprefented at D in the figure, and confifls of two 

 fide-pieces placed before the trough, but fo as not to obftrufl 

 the tallow, and bent forward to form an angle with its fides. 

 To improve the light, I alfo ufe in the lamp five fmall diftindl 

 wicks, of three threads each, inftead of one large wick, placed 

 near each other in a row, which renders the flame clear and 

 free from fmoke, and thereby alfo prevents any unpleafant 

 fcent. I ufed this lamp for more than three months, and 

 found it very convenient for reading or writing by, as when 

 once lighted it required no farther attention, and kept its 

 light at nearly the fame height at all times, and of the fame 

 degree of intenfity ; and I can further recommend it, as 

 yielding the greateft light at the fmallefl coft, in proportion, 

 of any invention yet made public which is applicable to do- 

 meftic ufes, 



I have had two lamps of this kind carefully made by Mr. 

 Lloyd, No. I7S, Strand, and left with him as models: In 

 one of which the chief object is cheapnefs, as far as confident 

 with perfection and neatnefs ; in the other, to form an elegant 

 utenfil for the ftudy, office, or chamber; and any gentleman 

 may be fupplied with them there, made exadly to my plan, 

 on reafonable terms ; and as Mr. Lloyd is the only perfon 

 at prefent appointed to make them, and inftructed fully in the 

 mechanifm, they can be had perfed from him only. 



It is probable wax might alfo be burned in this lamp as 

 well as tallow : of this I cannot fpeak from experience, but 

 mention it, as I know fome v/ould prefer to ufe it. 

 I am. Sir, 



Your very humble fervant, 



J. WHITLEY BOSWELL. 



Oa. 1, 1804.. 



AccourU 



