A 
Royal Society. 47, 
of the phlegm contained in the acid fpirit, is as the weight of the 
diftilled water ) then he confultcd the tables, where he fayv 
that the bulk of fpirit of nitre compared with the like bulk of 
diftilled water, has given a certain quantity of acid fak for 
each ounces and from thence he concludes, that the bulk of 
other fpirit of nitre whofe weight is known, compared with the 
like bulk of water, will give a determined quantity of acid 
fait, which will be obtained by the computation of the ratio of 
the weight of thofe fpirits with the weight of the like bulk of 
diftilled water, by concluding from them and from the known 
produ6l of acid lalt for the unknown product of the fame. 
An unufal Parhelion ani Halo hy Mr. Gray. Phil. TranC 
K° 2(52. p. 535. 
PRIL 7. 1(^99. between 4 and 5 o'clock Mr. Gray oh* 
fervedoneach fide the fun A Plate XIII. Fig. 23. a 'Parhe* 
lion B C connected by an Halo BDG of the ufual diameter - 
they had each of them a tail of a whitilli colour, extendeiJ 
oppofite to the fun, of about 15 or 20 degrees in length j the 
upper part of the Halo was touched at J) by the arch of a cir- 
cle, whofe ends were turned towards the Zenith Z ^ it had 
the colours of the iris but faintly ; betwixt this and the Ze^ 
nith was another portion of a circle E, which had the colours 
of the iris more lively than the former. 
A Journal kept from Scotland to Darien /;/ New Caledonia, 
'with an Account of that Country 5 by 2)r. ^Yallace. PhiL 
Tranf. N''. 2(J2. p. 53<5. 
C* E\P7*.z. 1^99, we weighed at Madera and v/ere under the 
*^ "Tropic o^ Cancer by the loth, when the ufual ceremony of 
ducking from the yard's arm was performed on fuch as could 
not pay their "Tropic botile 3 all this time we had a brifk and 
conftant trade-wind, which lafted three days more 3 but after- 
terwards we had it more variable than is ufuil in that part of 
the fea : The 28th we made T>efeada, a fmall high ifland, 
about a league in length, and as much in breadth 5 it is full of 
trees, but whether it affords water or not we know not- it is 
uninhabited; next morning we were betwixt the iflands of 
Antegoa and Montferat belonging to the Englifjj, both pretty- 
large and mountainous; Antegoa is peopled with Englifl) for 
the moil parr, and Montferat with a mixture of Englifi and 
Irijh-^ their producl is fugar and tobacco; we were in the af- 
ternoon clofe hyRedonda, a fmall rock about a mile long, inha- 
bited 
