152 Safely Lamps. — Tempcraiare oJ"Rulii in 1S15 I3' IS16. 



pot No. 2, thirty-six kernels appeared in a state of vegetation ; 

 and of two liundred kernels sown in pot No. 3, nineteen kernels 

 appeared in a state of vegetation. I hope this statement may 

 serve as -a caution to sucli of yon (and I understand the numbev 

 is very considerable ) who are disposed to trust to the black bar- 

 ley for seed; or at least that your attention may be drawn to a 

 subject of so much importance to our county. It is in the 

 power of every one of you to prove U\c correctness of this state- 

 ment by making the same experiments. 



" I am, gentlemen, your sincere friend, 

 " Lindcnham, Feb. 10, lol7. ' " ALIiKMARI.E." 



SAFETY-LAMPS. 



We have received a coumiunication from the Rev. Mr. Hodg- 

 son on Mr. Stevenson's pretended claims to this invention, to 

 Avhich, though many of the facts have been stated in our pages, we 

 would willingly have given a place had it readied us in time; but 

 we did not receive it till the 24th February (and the publication 

 must be out by the 2Stli). Indepeadently 0/ this, the publication to 

 which he has alluded does not appear to us to deserve the serious 

 answer which he has given to it, by again bringing forward all the 

 dates. All the facts that have transpired, which have been pub- 

 lished by Mr. Stevenson's friends, convince us that his attempts 

 at safety tubes and apertures were borrowed from what he had 

 heard of Sir Humphry Davy's researches. One paragraph, how- 

 ever, in Mr, Hodgson's communication deserves particular at- 

 tention, and therefore we insert it here : 



." I think it necessary (says Mr. H.) to notice that I have had- 

 110 authority from Sir H. Daw to publish extracts from his let- 

 ters ; but that I was obliged to do so in justice to myself: for 

 lualicious persons might have stated that hints from these letters 

 had been clandestinely conveyed to Mr, Stevenson. That this 

 was not the case, is to be found in the fact that safety apertures 

 and tubes were announced to persons concerned in the N. Castle 

 coal mines, before Mr. Stevenson had made an experiment on 

 iiiore tubes than one, or on apertures of any kind," 



COMPARATIVE TEMPSKATURE OF RAIN IN ISIT) AND 1816. 



In the last nuniber of the Bibli(il.heque UniverseUe there is 

 the following curious comparison between the temperature of the 

 rain at Paris in the years 1815 and 1816. In 1815 the mean 

 temperature of the first ten months was = + \2-Q° (centigrades). 

 In the yearlSlGitwas = + 10'5°. In 1815 the quantity of vain 

 collected during the first tea months was ^ 36 Qcnt, //• lu 



1816 



