(53) Numh. 4. 
PHILOSOPHICAL 
TRANSACTION S. 
Munday^ "jane 5. 1665. 
The Contents. 
A Relation oj feme extraQrdinary Tydes in the Weft-Ifles of Scot- 
land, by Sr, Robert Moray. The judgment of Monjieur hii^ 
zout, touching the Apertures 0/' Objed:-glaffes, and their ^vo-^ 
portions in refpeB of the feveral lengths f?/ Telefcopes ; toge^ 
ther with a Table thereof Conff derations of the fame ferjoii 
uponMr, Hook's New Engine for grinding Bf Optick-ghffcs, 
2V/r. Hook's Thoughts thereupon. Of a mans to illuminate an ^ 
Objedl in what proportion one pleafeth i and of the diftaoccs, that 
are requifUe to burn Bodies by the Sun. A further accQwpt by: 
l^lonfuur KwLOWt of Sigmor Campani j andVerjormances 
i^^cf/^ Optick-Glaffes. CainpaniV ^?2/n?^r theumtot^ and Mr. 
Auzout'j Animadverfions upon that Anfwer, An accompt of Mr. 
J^ower^J newly fubbJhedYmdicatiQi'i of Dr. Willis s Diatnbade. 
Febribus. 
A Kelation of feme extraordinary Tydes in the: 
Wefl'Jjles of Scotland ^ as it mm commu- 
nicated by Sr. Robert Moray, 
|N thatTradtof I/les. on the Weft of Scotland.calkd 
by the Inhabitants, the Long-JJland, as being nbcui: 
1 00. raiks long from North to South^xhtrc is a muU 
w titude of fmall Iflands, fituated in a freium^ox Vrith^ 
thatpaffes between the Ifland of Etif^ and the Herris amongft; 
which, there is one called Berneray^ fome three miles long, and 
■ ' ^ more. 
