464 MARBLE CEMENT INTRODUCED INTO AMERICA. 
4i.h. The delay cau!«e<l by freshets*, &c 
producing a stoppage from llie too great sup- 
ply of power. 
5th. The delay in seasons of drought,, when 
the supply is insufficient. 
These last are most vexatious occurrences, 
preventing work oftentimes when most is to 
ne done, and the uncertainty arising from 
the po.ssibility of sucli delays and accidents, 
is a constant care to the raa eager of such an 
establisinent ; whereas to the con.'umer of 
steam, the perfect certainly of the amount and 
regularity of the supply of power is a great 
auxiliary in conducting business. 
For a steam-engine, tlieonly use of water is 
a sufficiency for the boiler ; and in these days 
of economy of heat and steaiu, a very small 
quantity of fuel is used, and but little water. 
We have seen a rotary engine, estimated at 
l5-liorse power, evaporating but 40 gallons 
per hour. 
6th. Delay in winter, and in our uncertain 
climate this may sometimes be consiilerable, 
and, in an establishment of great extent, per- 
liaps fatal. 
'I'o balance all these expenses, peculiar to 
the use of hydraulic power, theie is, as far as 
we can recollect, but one peculiar to that of 
steam, namely, /ne/. Now, in saw-mills this 
experi.se is noUiing, and in all instances much 
less than forniei ly. 
Our persevering countryman. Dr. Nott, 
has already succeeded in greatly reducing tliis 
item of cost— and he does not yet appear to 
be satisfied. 
As regards fuel, Avery’.s engine has im- 
mense advantages over otliers, inasmucii as 
the quantity of water used is less than in any 
other case. 'I'lie elasticity of the steam ope- 
rates more advantageously than in any other 
construction, the small quantity of watei used 
being a proof of this. 
^In the engine above referred to, the cost for 
coal was rattier less than one dollar for ten 
hours. 
It is almost needless to observe rliat, in 
many large establishments, manufactories, 
&c., the application of a portion of the steam 
to heating, &c., nearly, if not quite, compen- 
sates the cost of fuel. The certainty and 
uniformity of this method of diyiug goods 
have fully established its superio; ity. Indeed, 
in the art of dyeing, certain colouis owe tlieir 
brilliancy to the rapid and high heat of >team, 
and they could 1 e produced in no other way. 
While speaking of this use of steam, we must 
notice an engine erected in the Astoi Huiel. 
This isasmall engine ofb-hoise power; its use 
is to pump water from the different ci-tems to 
all parts of the house— supply ilie. baths with 
hot and cold water— <dean knives — luu'^h 
shoes — loasiand grind coffee; and the steam 
cooks the vaiiuus dmhes in the kitchen, and 
also dries the clothes, which by this method 
of proceeding are ready tor use witn unpiece- 
dented dispatch. 
To these and numberless other uses is this 
engine turned, saving an immense number of 
servants, a great quatiiity of fuel, and avast 
deal of time. 
(The exhaust steam-pipe of this engine i* 
over 320 feet long ) 
One of the greatest advantages of steam- 
power, in many cases, is, that it admits of 
change of locality, without injury to the nia- 
ctiinery, and often with benefit to the em- i 
plover. i 
1 n this respect, again, A very’s engine stands j 
pre-eminent. The machinery is beaniifclly | 
compact, and consequently foitable. An |j 
engine of l5-hoise power is liaidly a load for j‘ 
a horse, the whole weighing less tnan COOII s. j; 
Let us suppose, liiat a man puicliasesa f 
piece of timber land, of prime quality, but, 
unfortunately (as is thought), away horn any 
water-course. 
Let him procure an Aveiy’s engine ; and 
this, connected with iiis saw-miil, can be 
placed upon wheels and moved, by the engine I 
itself, if he pleases, to any part of Ids land, i 
( iNIiils capable of such an arrangement, and 
very compact, are now easily to he piocuied.) 
Let him locale his mill near a spring, and 
commence operations. The wa-ie and rub- 
bish, that in most ca.ses i'* a diug, is entirely 
consumed by tlie engine ; the ground is 
cleared, and nothing is to be removed Imt the 
perfectly formed timber. 
Amongother usefu 1 applications of such an 
engine, in tlie toiest itself, no one can be equal i 
in beauty of opeiaiion to tlie valual le stave- j 
maclime of Philip Cornell, N. Y. This ma. | 
dune jiromises to lie of great se'vire. . With | 
such an aiiangemeni as that of the saw-mill | 
above mentioned, nearly, if not quite, double | 
the usual number of staves can be cut from 
the limber before transportation, and these ' 
are already dressed and ready for use, either j 
for liquids or solids. 
'I’hese are only a few of the very many use- | 
ful ap[)licaiious of this sort of travelling ma" ' 
chines. Others will suggest themselves to 
our readers. 
It must be very evident that, whatever ! 
biings into use property of little or no value, j 
enabling the produce of such land to compete I 
successfully with that of much better, must i 
add to liie w-ealth of the landholder, or timber- j 
mer chant, a sum equal to the cost of the best 
land. I 
Thus a great uniformity of value would re- I 
suit, and of consequence amoie equal compe- * 
lency to those on, or away from, great water- j 
courses and canal.s. 
MARBLE CEMENT. | 
An important improvement, which has been 
for several years in progress is aliout being 
introduced to 'he more general notice of the 
public, and, we believe, into extensive use for 
building purposes. It is a ci mposition or 
cement, ot vvhii h the principal ingredient is 
marble or lime stone, which, vvlien applied to 
the inner or outer walls of buildings, presents 
the appearance of polisiied marble, of the 
various hues an(i, qualities vvhich distinguish 
the beautiful material imitated. What would 
be thought of a magician who possessed the 
power of changing the sombre brick and stone 
walls of the buildings of a city, in one week, 
