The Potter journal. [volume] (Coudersport, Pa.) 1857-1872, 1861-02-21
ROHRER'S
PRACTICAL CALCULATOR,

PRACTICAL CALCULATOR.
A Book of Plain Rules and Calculations
for Business Operations, by MARTIN
M. RoHRER, Practical Surveyor and
Conveyancer. New Edition, published
by J. b. Lippincott & Co, Philadel-
phia.
This Work contains 204 pages, and up
wards of 500 Rules and Examples, entirely
and thoroughly PRACTICAL, such as arise eve
ry day in the common pursuits of Business.
1t has already passed through a number of
Editions in rapid succession. and is pronounce
ed by all classes of business men to be the
HANDIEsT BOOK OF REFERENCE, pertaining to
calculations, that has ever been published.
Every Example in the book is WORKED OUT
IN FULL and stated in a plain manner, So that
when a parallel case arises, those referring
to the work viii find no difficulty in readily
solving it in a word, the general arrange
ment Of the CALCULATOR is so simple, that
any one who knows how to ADD, SUBTRACT,
MULTIPLY, OR DIVIDE, can easily solve any or
binary example that arises in business, or ar
rive at the true result of and estimate requir-
ed.
The chief aim Of the author has been to eS-
chew theory and philosophy in figures, aim
ing only ut facts and simplicity, believing
that business men care little about spending
time in discussing the philosophy of rules, or
the science Of figures, deenling it sufficient
for their purpose to be able at Il moment, by
reference, to arrive at the TRUE RESULT. The
CALCULATOR differs in this respect from all
Arithmetics of the day and kindred works
it is a key to practical business calculations
it is in the hands eff the business man what
the key to mathematical works is in the hands
of the teacher in the school-room-u GacilG-
tates time and iasures correctness.
TFgE WORK TREATS OF
Measurement of Land, of Lumber, of Brick
and Brick Work, of Stone and Stone Work,
Of Grain and Grain Bins, of Coal and Coal
Bins, of Wood, of Solids, of Liquids, Of Cir
cular, Square, or Irregular Vessels, of Cisterns
and Yats, of Roofing, of Plasterers', Painters,
Glaciers, PAYERS, Plumbers, Paper Hangers,
and Upholsterers' Work. 1t treats of Curren-
cy and of Foreign and Domestic Exchange, of
the Decimal System, Of Reduction and its ex.
tended application to Business, of Simple and
Compound Interest, and their entire applica-
ton to Business transactions, with the laws
and usages governing and regulating the same,
together with Numerous Commercial Forms
ofLegalTender, Of Partial Payments on Notes,
of Banking and Bank Discount, of Equation
of Payments and of Partnership Accounts, of
Assessment of Taxes, of Weights and Meas
ures, of Square and Cubic Measure, of the
Square Root and its application to Business,
of Surfaces, of Excavation, and of many other
important practical matters not within the
scope OF an advertisement to mention.
IT Is JUST THE BOOK FOR THE
Farmer, the Merchant, the Mechanic, the Ar
tizan, or the Professional man. 1t has prov
en- q valuable auxiliary to the Lawyer, the
Justice of the Peace, the Ccnveyancer, and
Real Estate Broker, to the Assessor, the Bank
er, the Clerk, to the Civil Engineer and the
Surveyor, to the Carpenter and Bricklayer, 10
the Stcne Mason and the Plasterer, to the Pa
per Hanger and Upho!sterer, to the Payer and
the Tiler, &c, &C. each and all will find it
adapted to their various wants better than
any book published.
no. Mailed tpost poid) to any part of the
United States upon receipt Of the money.
Price of a single Copy, in Cloth, so Gents, or
two Copies for 81 90. Bound in Pocket-book
form, Morocco, 81 90 per copy.
Address, NJ. NJ. ROHRER,
Box 1911 Philadelphia P. o., Pa.
l4-6 mo.