The daily exchange. [volume] (Baltimore, Md.) 1858-1861, 1860-11-05
CITY NTELLIGENCE.

MARYLAND INSTITUTE FAIR.-Among the many
valuable inventions exhibition in the Insti tute
Fair, none are more attractive or useful than
Knowles patent Safety Boiler Feeder, exhibited by
Messrs Knowles and Place, Glovesville, New York
This is a most important and much needed improve
ment. and will no doubt come into general use
The improvement consists of two brass pipes fixed
on the outside Of the boiler, and connected at one
end by return coupling. The other ends of the
pipes are connected, one with the steam space and
the other with water in the boiler by which means
the water in the pipes is on level with the water
in the boiler. To the end of the upper pipe is at
tached lever, and this lever has control of the
pumps. The end of the lower pipe rests against
whistle If the water falls in the boiler it also falls
in the first pipes, and the space which it occupied
is filled with steam. The heat and the steam causes
an expansion of the pipe, and this expansion ope
rates on the lever having control of the pump and
sets it to work pumping into the boiler. As soon as
the requisite amount of water is in the boiler the
pipe grows cold and the lever returns to its place
1t the pump should get out of order and the water
continued to decrease in the boiler, it effects the
second or lower pipe, causing it to expand and
blow the whistle, and thus give the alarm. The
machinery of this Improvement is of the simplest
character, and not at all liable to get out of order
and to stationery engines is of the utmost value
Ii is in operation in the Fair the entrance of
the machinery department.
AS is usual, Messrs. Garfield. Brother Co. have
placed a case of their beautiful wares on exhibit
ton, and the articles were arranged with excellent
of elaborate and exquisite nish silver pitchers and
walters, knives and forks, gobets and punch bowls
and indeed, every class of table ware. The display
OF Jewelry is magnificent. There are diamond,
sapphire and emerald rings, together with others
of every variety of precious stones, making an ex-
hlbltlon of great magnifcence. Their display of
cheaper wares abaa and other classes, is also very
fine. The case has attracted its full share of at
tention, and is universally admired.
Messrs. Cortlan & Co. exhibit case of silver pla.
ted ware OF great variety and superior workman
ship.
Messrs. Grover & Baker have on exhibition some
half dozen of their celebrated Sewing Machines
which are in operation during Fair hours. These
machines have such wide spread reputation that
it is useless to commend them to the public where
they are known best, they are liked most. Their
excellence consists in the durability, neatness and
rapldity In which the work s done, and their adap-
tation to all kinds and classes of work, from the
most delicate to the strongest.
On the third story of the Institute building Ga
part but seldom visited by those who attend the
Fair,) is to be found of the largest collections
of practical and useful agricultural mplements,
which has ever been exhibited. This display is from
the extensive agricultural warerooms of Ezra
Whitman, Esq, the chairman of the Standing
Commtte on Exhibition. Previous to the opening
of the Fair, MIR. Whitman had selected one of the
ost prominent positions in the hall for the display
OF his wares, but as the time approached for the
commencement of the exhibition, the demand for
space became so great that it was found to be i'm
possible to accommodate the applicants. Mr..
Whitman having more at heart the success of the
Fair than prominent display of the prodncts of
his warerooms, generously gave up his space the
main hall and removed his articles to a
room on the third story, where they be
seen. The collection consists of pows, threshing
machines and straw carriers, fodder cutters, corn
shelters, separators, mills FANS harrows, and in
fact every variety of agricultural Implements of
the most approved kinds, made in the best style
and of the most durable material. He has also on
exhibition large variety of weather cocks, which
nna1 opo hnor hot,, IT..
leres, near the south end of the main Hall. Mr..
Whitman has been unceasng in bis efforts to give
success to the Fair, and has the satisfaction to
know, that as far as the exhibition itself is con-
cerned, he has not labored in vain.
THE POPULATION OF BALTIMoRR IN ls60.-It ap-
pears by the returns of the census, just taken by
Marshal Watkins and his Deputies, that the popu-
lation of Baltimore at the present time is 2l3 037.
To give an idea of the growth of the city from the
year 1880, when the first census was taken, up to
the year 1860, period of seventy years, the fol-
lowing figures are given showing the increase of
population during each decade: