o any other Baking Powder in
market, are owing to its perfect purity, quality, quantity,
and economy. The ingredients are strictly free from deleterious
substances, and hence the full strength of each is obtained, and the
results are uniform every time it is used. This cannot be the case in
those of ordinary manufacture, and for proof of our assertion, we ask
those who have never used DOOLEY'S YEAST POWDER to give it a trial.
Your grocer keeps it. DOOLEY & BROTHER, Manufacturers, 69 New st., New
York.

* * * * *

PATENT CUTTERS for the Teeth of Gear Wheels, which can be sharpened by
grinding, without changing their form. Cutters made on this plan
will last many times as long as those of the common form, with the
advantage of being always ready for use. Descriptive circular, with
price list, sent per mail on application. BROWN & SHARPE M'F'G CO.,
Providence, R. I.

* * * * *

A SPRING OF WATER AT THE TOP OF THE HOUSE.

HOUGHTON'S AUTOMATIC WATER ELEVATOR, patented Feb. 7, 1871, No.
111,542, delivers water from the well or cistern in the tank at the
top of the house. Is operated by the fire in the kitchen range without
additional fuel; is simple in construction, reliable and cheap.
Reliable parties wanted to introduce them into use in all the States
except New England. For drawings and full description address

CHARLES HOUGHTON, 41 State St., Boston, Mass.

* * * * *

SHORT HAND.--150 words per minute in four weeks. Send stamp for
Circular.

PROF. GRAY, P. O. Box 4847, New York.

* * * * *

WATCHES THAT ARE WATCHES.

WE SHALL BE PLEASED TO SEND OUR DESCRIPTIVE PRICE LIST OF GENUINE
WALTHAM WATCHES, TOGETHER WITH AN ILLUSTRATED PAMPHLET ENTITLED A
HISTORY OF WATCHMAKING, TO ALL WHO SEND US THEIR ADDRESS. NO MATTER
HOW REMOTE YOU ARE FROM NEW YORK, WE CAN SELL YOU A WATCH AT THE SAME
PRICE AS IF YOU WERE HERE. WHEN YOU WRITE MENTION THAT YOU SAW THIS
NOTICE IN THE SCIENTIFIC AMER. HOWARD & CO., 865 BROADWAY, N. Y.

* * * * *

ENGINES, TOOLS, MACHINERY, ETC.,
FOR SALE AT THE
NOVELTY IRON WORKS,
FOOT OF EAST 12TH STREET, NEW YORK CITY,

EMBRACING Engines, Planers, Lathes, Smith and Boiler Makers' Tools,
and Machinery and Patterns of the most approved kinds, etc. Also,
1 High Pressure Engine, 12-inch diameter by 30-inch stroke: 2
Stevenson's