rjll. TheDtfcrtpiioHMbie of two dRITHMMTlCK INSTRV^ 
MENTS, ^c. By S.Moreland. Frimd m Londdn,i673./>i 12% " 
THE Ingenious Author of this B0ok,having forae years fince coa. 
trived two Inftruments.whereof the one is for Addition and Sub^ 
traftion,the other, for Multiplication 5 gives us here both a Defcrip. 
tion of the parts and Strufture of thefe Inftruments,i^W the way and 
'manner of Ufing thena • affirming withall ,that the latter of thele In- 
ftrunfients alone is alfo of excellent life in Dhijion^ as likewife in Ex- 
trafting the Square,Cube,and Square- Square- Roots j and likewife 
that, if any Curious perfon will go to theExpence,the>f^/;?^ Inftru- 
riient,being Joyned to the Mnhiplying, performs all the four Species 
of Arithmctick, and the Extrac9:ion of the faid Roots, without the 
help ofPen and Ink, or expofing die Operator to any difficulty 4r 
uncertainty. 
But for the better underftanding of thefe Inffrurtients, he cndea^ 
vours fo to explain and demonftrate the reafafl of the Operations of 
the faid four J'/^d'r/^/, and Extraction of RootSjas to render them plain 
and eafie to the meaneft capacities : Annexing thercunta, in fliorc, 
the Doftrin of Proportions, Arithmetical, Geometrical, and Muficalj 
; as alfo the whole Intrigue of the Golden Rule: 
Which done, he teaches,i.The.Diameter of any Circle being given 
in Integers^ iofiwiiihtPenfhery^ ^nithc Square -root oi the Area^m 
hfimt^m ^without the help newly mentioned . 
Next, he giveth us his Perpetual Almamckj, together with an Ex- 
iplanation thcreof^dividing thatAlraanack into three diftinft Tables, 
which make the life thereof obvious to all that fliall tak^ notice of his 
diredions and exemplifications, 
Further,he fubjoiR^th a Table for the ready fihding,what Sign the 
Moenisin^ or fliall be for ever, together with the Ufe thereof : As 
alfo a Table fliewing theTime of the Moon's coming to the Somh^^^Ai 
Quantity of her fliining; with direSions how to ufe the fame* 
To thefe he adds a T yde^T die and its Ufe,for certain Havens in and 
^hout E^^gland'^ whereby may be kraown,what Moon raaketh a FM Sea 
. in any of fuch pi aces, and how many hours and minuCs are to be added 
to the time of the Moons coming to the South for the time of H^l?- 
More-over,he fets dowa the time orttic IS'/ifll i(tfi% 
; throughout the whole year-> and furnlflies us^e?^^ wiila Tabi 
ing theLength of the longeft Artificial Day in all plates from the E« 
^^pinodial to the Poles of the World ^ ^;^^vvithMherT^ 
difcovering the exaft time of the New and Full Moon, as likewife the 
firftand fecond ^adms^ and coivfequently her true Age, from the 
year 1573 to 1 700, , — ; - j - j^n 
