DESCRIPTION OF a 



No. XL 



A Def crip t ion of a newly ifivented Globe Ti?ne-Piece. By 

 the Rev. BuRGiss Allison, A, M. 



April 4th, I 800, 



I'he commit (ee to "jchom ivas referred the communication 

 from Burgifs Allifon^ report 



That having examined the drawing of his globe time- 

 piece and the references they are of opinion that it dif- 

 plays confiderable mechanical ingenuity. They think 

 however that too much has been attempted by the in- 

 ventor. The part intended to exhibit tlie phafes, &c. 

 of the moon is too little connedled with the other parts 

 of the mact.lnery, and is not of great importance, as 

 even were it not liable to objedlion on account of its 

 detached fituation, it would only fhew the mean and 

 not the true time at which the different phenomena 

 would occur. An error v/ill alfo arife in the apparent 

 place of the fun on account of the equable motion of cir- 

 cle of illumination. This objedtion is of no great con- 

 fequence. From the mode which the inventor pro- 

 poies of making the hours on the equator it is evident 

 that the time Ihown by the globe will be for that me- 

 ridian only on which the hour of fix is marked. The 

 committee therefo^e recommend to the inventor to re- 

 move the lunar part entirely ; and to have the hours 

 marked on a moveable hoop or circle which may be at- 

 tached to the globe fo as to fuit any meridian. Upon 

 the whole however the committee deem the communi- 

 cation worthy of publication. 



R. PATTERSON, 

 JOSEPH CLAY. 



BrifloL 



