1834.] Correction of note on M. Court's Roman coins. 635 



but suppose that a very small inequality of pressure would be sufficient 

 in the case of air. Such an inequality is no doubt caused by the 

 action of the moon. Mr. Howard found, on an average of 10 years at 

 London, that the barometer stood 0.10 (I quote from recollection) 

 lower at change and full, than when the moon was in the quai-ters. 

 No such inequality could be found in this climate, though a difference 

 to a small amount may be detected. If the Editor will refer to the 

 Table No. 3, annexed to my last paper, he will see that I did attempt 

 such comparisons as he speaks of, with the barometer ; but left them 

 off, owing to the results being less satisfactory than those derived from 

 the rain-fall and dew-points. I must acknowledge that it is by the 

 indications of the bai'ometer alone, that we can ever hope to include 

 the atmospheric changes within the precise limits of a mathematical 

 formula ; but if we are precluded from this, we are not therefore 

 debarred from adopting a more indirect and humble line of investiga- 

 tion, which, though it can claim no praise for ingenuity of research, 

 may yet present us with some results of general usefulness. If we 

 can obtain one additional presage of an approaching storm — if we can 

 indicate with some probability the year of drought and famine, our 

 time has not been misemployed, nor our labors wholly fruitless. 



I perceive that the effect of the moon's declination is felt in the 

 rain-falls in England, though but slightly, as was to be expected. 



VII. — Correction of a mistake regarding some of the Roman coins found 

 in the Tope at Manikyala opened by M. Court, By Lieut. Alexander 

 Cunningham, Engineers. 



[We hasten to insert the following extract from a letter just received, as the 

 corrections pointed out appear to be in every case judicious, — in the case of 

 Lariscolus conclusive. We compliment our young friend upon the success with 

 which he has commenced his numismatic studies, and shall always be happy to 

 profit by his criticisms. — Ed.] 



I take the liberty of addressing you on the subject of the coins 

 found in the second tope at Manikyala by Mons. Court, as I conceive 

 you have made a great mistake in the age of one of the Roman coins, 

 and it is from this very coin that you fix the date of the erection of 

 the tope. — The coin I mean is No. 22. You remark that the 

 hehneted figure on this coin and the unintelligible inscription on the 

 reverse lead you to ascribe it to the age of the Emperor Constantine : 

 now these very observations of yours, setting aside the appearance of 

 the coin, convince me that it is of the time of the Commonwealth ; 

 and I take it to be one of the Gens Herennia, of which there are 15 

 varieties : it may however be one of the Gens Quinctia, of which there 

 3 m 2 



