Additional Notes, 41 7 



of the radius of the instrument ; tlmt the glass for tlie solar vane 

 should not be less, but rather larger, than a silver shilling, vith \\% 

 vertex very exactly set ;^ and that the utmost care be Liken to 

 place the middle of the curve exactly perpendicular to the line or 

 radius of 45 deg., as the observer must also uikc care that the two 

 vanes on tlie limb be kept nearly equidistant from that dcgre?. 

 To which I shall only add, that it may be best to give the horizon- 

 tal vane only one aperture, not two. The rest, I suppose, may 

 be left to tlie workman. Thus, doubting I have already been too 

 prolix on the subject, to which nothing hut a sincere inclination 

 to promote any thing that might contribute to a public bencht, 

 and to do some justice to merit, could induce me, J shall only 

 request that what 1 have here offered may be construed by that 

 intention. 



J. LOGAN. 

 Philadelphia, June 28, 1734. 



P. S. [By the Editors of the AIa<razinc J] It is easy to see, by 

 a caretiil perusal of tliese two letters, and that in our last Maga- 

 zine, the progress of this invention, and how far Mr. Godfrey 

 ought to be considered as tlie inventor. It is our business to give 

 impartial accounts of facts and transcripts of authentic pa})crs. 

 The reader, after that, is to judge for himself For our own 

 part, we have no hesitation in pronouncing Mr. Godfrey the real 

 original inventor of this famous and useful instrument. 



The following extract of a letter from Mr. Hazard, which ac- 

 companied the above documents, ought to be added, in justice 

 both to the Royal Society and to Mr. Godfrey. 



*' Alderman Hillegas, of this city (Philadelphia), knew God- 

 frey. He says, he remembers to have heard, perhai)s fifty years 

 ago, that, as HadJey had obtained tlie patent, complete, justice 

 could not be done to Godfrey ; but that the Royal Society, think- 

 ing his ingenuity ought to be rewarded, eitlier subscribed for him 

 as individuals, or gave him out of their funds, af200 sterling : 

 and knowing his infirmity (for it seems he was apt to indulge in 

 intemperate drinking), they thought it better to send the amount 

 in household furniture than in cash, and, irUer alia, sent him a 

 clock J which the alderman remembers to ha>e seen." 



Godfrey had a son, Thomas Godfrey, junior, who, in l/dj, 

 published a volume of Juvenile Poems. The young man is 

 Vol. I. 2 E 



