grass_ without _clogging_ or _interruption_. More than 1000 have been
sold the present season under the following warranty, and not in a
single instance have we been called on to take one back.

(Warranty:) That said machines are capable of Cutting and Spreading,
with one span of horses and driver, from ten to fifteen acres per day,
_of any kind of grass, heavy or light, wet or dry, lodged or standing_,
and do it as well as is done with a scythe by the best mowers.

The price of our machine, with two sets of knives and extras, is $110,
cash, delivered on board of cars or boat, free of charge.

HOWARD & CO.,
Manufacturers and Proprietors, Buffalo, N. Y.

_Buffalo_, Aug. 1, 1853.

RUGGLES, NOURSE, MASON & Co., Manufacture Ketchum's Mower for New
England.

WARDER & BROKAW, Springfield, Ohio; for Southern Ohio and Kentucky.

SEYMOUR & MORGAN, Brockport, N. Y.; for Michigan and Illinois.

NEW AND USEFUL WORKS.

JUST PUBLISHED BY

_D. APPLETON & COMPANY_

A new and much, enlarged edition of

=DR. URE'S=

DICTIONARY OF ARTS, MANUFACTURES AND MINES.

Containing a clear Exposition of their principles and practice.
Illustrated with nearly 1,600 engravings. Complete in two large 8vo.
volumes; counts over 2,000 pages. Price $5.00.

This new edition is nearly a quarter of a century in advance of
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The statistics, inventions, and improvements, are all brought
down to the present time.

The results of the London Exhibition on the respective subjects
of which the Dictionary treats, are presented with great fulness
and accuracy.

The numerous errors in the typography of the London edition have
been corrected in this.

=SIR CHARLES LYELL'S=

PRINCIPLES OF GEOLOGY;

Or, the Modern Changes of the Earth and its Inhabitants, considered as
illustrative of Geology. A new and much enlarged edition. Illustrated
with maps, plates, and wood-cuts. 1 vol. 8vo., of 850 pages. Price
$2.25.

=SIR CHARLES LYELL'S=

MANUAL OF ELEMENTARY GEOLOGY;

Or, the Ancient Changes of the Earth and its Inhabitants, as illustrated
by Geological Monuments. A new and greatly enlarged edition. Illustrated
with 500 wood-cuts. 1 vol. 8vo. Price $1.75.

[***] The author of these works, stands in the very front rank
of scientific men, and his works upon the science to which he
has devot