34 
A ME RIGAN AGrRIO ULT GRIST. 
[January, 
Bausch & Lomb Optical Company, the inventors 
and manufacturers of the Excelsior and higher 
grade Microscopes, and of many other optical in¬ 
struments, who enthusiastically seconded and aided 
our efforts to the utmost of their skill and ability. 
A large number of experiments have been made, 
many forms and combinations of lens and stand, 
etc., have been constructed, machinery has been 
devised for rapid and perfect work, and as the re¬ 
sult, we have A Most Valuable Microscope, 
which we now place before our readers with a sat¬ 
isfaction that is certainly very great to us, aua will 
doubtless be pleasing to every reader of this journal. 
llescrlptioii of Use Microscope. 
The Microscope is shown in the engravings here¬ 
with, figure 1 representing it with the lenses sepa¬ 
rated. The three Lenses (a, b, c, iig. 2) are of su¬ 
perior glass, carefully ground, adjusted to use sepa- 
Fig. 1. —MICROSCOPE WITn LENSES SEPARATED. 
rately and in combination,and each one is in a polish¬ 
ed hard rubber setting. The lens a (Fig. 2) mag¬ 
nifies about 6 diameters or 86 areas or surfaces ; b 
magnifies about 8 diameters or 64 areas ; c magni¬ 
fies about 10 diameters, or 100 areas; b and c, 
used together, magnify about 18 diameters, or 334 
areas. The three used together magnify about 25 
diameters, or <»35 areas. Used singly, or in 
combined pairs, and triplet, seven different magni¬ 
fying powers are obtained , of from 6 to 25 diameters, 
or from 36 to 625 areas. It will thus be seen that 
by using all three lenses upon a minute object or 
part of an object, its surface or area will be mag¬ 
nified or expanded 035 times ! 
A Diaphragm, d, is used to cut off distortion 
and render the field of observation distinct. (Full 
Fig. 2.— STAND—LENSES — DIAPHRAGM. 
explanations of the use and mode of using each part, 
with many illustrations, to aid all to the proper 
management of the instrument, will accompany 
each microscope sent out.) 
The Stand (fig. 2,) has a base, s, of polished hard 
rubber, with an opening to admit light underneath. 
In the top of the base is a fixed glass stage, z, 
upon which to place objects to be examined. Two 
thin plates of glass are provided to lay over 
this, between which flat objects may be placed. 
The water-proof Cell , with a central aperture, 
can be placed between the glass plates, forming a 
cavity for liquids, for small insects, seeds, etc., 
etc. These plates and cell are held firmly in place 
by the Metallic Clips or Springs, so that the in¬ 
strument can be set on the table or held in 
the hand for opaque objects, or be held tip to 
the light when examining transparent or other 
specimens which are best seen by light passing 
through them. — The whole is inclosed in a neat 
Case or Box, with cover, for carrying and keeping. 
(Engravings of the different parts were given last 
month ; and they will be found on the descriptive 
sheet sent with each Microscope.) 
No instrums tt' so well made , so complete and desir¬ 
able, has hitherto been offered to the general public at 
so low a 2 )riee as $ 3.50. With the improvements 
in mode of manufacture, and the great number 
contracted for, this instrument will be supplied 
at retail for only 
ESIJ'I' to every sictmtl ssil>seril»er 
do the American Agriculturist for 
1878, one oi’tlaese Microscopes wall 
!»e shij» plied complete 4<>i‘ At) eesiis 
above Site snil»scirlpti<>ai pa-iee, wlaesa 
tsa!<«‘aa sat tlae office oa- its delivery 
provided for. Tlae Ptablisbcrs pay 
for tlae aidditioutil cost of niaiaafac* 
Sure—:t large sum iaa the aggregate. 
(The American Agriculturist will be sent post-paid 
from receipt of subscription to the end of 1878. The 
Microscopes will be delivered as provided below.) 
HERE ARE THE TERMS : 
One Subscription and One Microscope.$2.09 
3 Subscriptions and 2 Microscopes.$3.83 ($1.90each.) 
3 Subscriptions and 3 Microscopes.$5315 ($1.15 each.) 
4 Subscriptions and 4 Microscopes.$6.60 ($1.05 each.) 
5 to 9 Subscribers and 1 Microscope each.$1.60 each. 
10 to 19 Subscribers and a Microscope each... .$1.55 each. 
20 Subscribers anda Microscope each.$1.44 each. 
Or, In clubs of 20 and upwards, $1.10 for each subscrip, 
tion, and 33Kc. for each Microscope, (that is, $1 extra for 
every three Microscopes, in all clubs of twenty or more.) 
©elivery ©f the ITIferoseejjes. 
{Bead all the Following to avoid Mistakes.) 
I. Any Subscriber for 1878, will receive the 
Microscope on culling or sending for it at the Office, 
245 Broadway, without expense, save the small 
payment of 40 cents above stated, which is only 
a part of the actual cost of manufacture alone. 
II. Whenever there is a club of subscribers at 
any place, one of their number can be appointed 
to receive the Microscopes for all, and have them 
come by express, making the cost of carriage but 
a few cents each. We will pack them safely with¬ 
out charge, and forward them in any way directed, 
on receipt of the names for whom they are to be 
supplied, with the small extra sum for the Micro¬ 
scopes stated above. 
III. Until otherwise announced we will under¬ 
take to deliver them to any part of the United States, 
and Upper and Lower Canada, on receipt of 15 cents 
for each Microscrope, for payment of carriage. 
IT. Our subscribers in foreign countries, not 
named above, will need to provide for, and direct 
how the Microscopes shall be forwarded to them. 
Any Subscriber already on our boolcs for 1878, can 
have a Microscope by remitting 40 cents, (adding 
the 15c. more, if to be sent prepaid.) 
1^. IB.—The Microscope is designed for all 
subscribers on our books for the American Agricul¬ 
turist for all of 1878, no matter from whom received, 
on the receipt of 40 cents—the Microscopes to be 
taken at the office ; or 55 cents, if to be sent pre¬ 
paid, except to foreign countries, as named above. 
To non-subscribers the Microscopes will invariably 
be $1.50 each, and cost of delivery if we deliver it. 
MRS. OLD FOGY DOES I MRS. COMMON SENSE 
NOT USE THE DOES. 
ROBBINS WASHER. | TAKE YOUR CHOICE. 
TO MIKE MONEY 
SECURE AN AGENCY 
FOR THE 
CE 31* 
ROBBINS FAMILY WASHER. 
Tliis machine has been ON ' TRIAL for the past six 
months in every State and Territory in the Union, and the 
almost unanimous verdict of housekeepers is tliis : “ Your 
Washer has proved a complete success.” Some of 
the reasons why this popular verdict lias been reached may 
be found in these facts: 
The Robbins Washer is an entirely NEW MACHINE. It 
is constructed upon a NEW PRINCIPLE—that of forcing 
water by downward pressure through the fabric. The dirt 
or discoloration is removed by water force—there is no 
rubbing or friction about it. This principle is the only one 
that has ever been successfully applied to the cleaning of 
fabrics by machinery. All others have failed in one or more 
essential points. The Robbins Washer will cleanse per¬ 
fectly, without rubbing, all kinds of wearing apparel, table 
or bed linen. It will not injure the most delicate fabric. It 
is the greatest bleacher extant, and for this purpose alone 
is worth ten times the price of the machine. It is simple, 
self-operating, never gets out of order, and will last a life¬ 
time. It saves time: it saves labor ; it saves material. 
By purchasing a ROBBINS WASHER you can count the 
hard drudgery of the washboard among the tilings of the 
past. 
Therefore, we confidently say to everv housekeeper in 
the land, You want a ROBBINS WASHER. You cannot 
afford to be without one. It will pay to buy one. 
THE RETAIL PRICE IS ONLY S3.50. 
Sample to those desiring agencies, $3. 
In bringing the Robbins Washer before the public it 
becomes necessary to take into brief consideration the 
ART OF CLEANSING FABRICS, 
which, although so common, is yet imperfectly understood. 
Having bad a lifelong experience in the laundry business- 
in connection with first-class hotels, public laundries, 
asylums, hospitals, &c.—we know whereof we speak. The 
numerous devices of friction rollers, pounders, squeezers, 
dashers, agitators, steam wash boilers, &e., have all done 
very well, so far as it was possible for such principles and 
devices to do. But they have all failed in one or more of 
the three essential points, viz.: The saving of labor, the 
wear and tear of clothes, or in perfectly extracting the dirt 
or discoloration—ail of which are accomplished by the 
ROBBINS LITTLE WASHER. 
WHAT IS IT THAT REMOVES THE DIRT? 
You may ask all washerwomen and housekeepers, and 
your answer from nine out of ten will be: “ Plenty of elbow 
grease or, in other words, plenty of hard, laborious rub¬ 
bing on the washboard. And such is the case, for you first 
have to rub soap upon the cloth, then you have to rub it in 
to make the dirt soluble. But does that remove it ? No; 
to do that you must first dip it in the water, and then rub it 
in again to force water through the fabric. That is what 
removes dirt after being softened by the chemical action of 
the soap upon it. 
The way in whicli this could be the most economically 
accomplished is what we have so long and patiently sought 
after, and at last, a principle has been demonstrated that 
in uniting all the above named, in 
THE PRINCIPLE OF THE LITTLE WASHER 
is embodied all the essential points. First, we have the de¬ 
sired heat, which expands the fabric and causes it to dis¬ 
charge the dirt,. Second, we obtain a powerful suction 
beneath the clothes, whicli causes a rapid downward current 
of water force through and through them, thereby remov¬ 
ing the dirt. Third, we use a large body of water, which 
holds the dirt in solution. Thus we cleanse thoroughly, 
rinsing the clothes as usual being all that is required to com¬ 
plete the operation. 
The Washer is composed of solid galvanized iron, which 
will not, rust or corrode. There are two sizes-the No. 1, or 
family size, for ordinary household use; and No. 2, or hotel 
size, suitable for country hotels, boarding-houses, laun- 
dries, &c. 
OUR METHOD OF HANDLING. 
We want agents everywhere throughout the United States, 
in every State, county, town, and hamlet. The reta 1 price 
of No. i Washer is $3.51); of No. 2 Washer, $5. But, we sell 
sample machines of No. 1 size at $3; No. 2, or small hotel 
size at $4. Canvassers for this Washer can make more 
money witti it than with anything ever before offered to the 
public As, for instance, we established two agencies to 
test the sale of the Washer upon its merits—one in Nauga¬ 
tuck, Conn., and one in Providence, R. I. The former, Mr. 
Charles Daniels, in a town of about 2.000 inhabitants, sold 
bv canvassing in two weeks eighty-two Washers. In the lat¬ 
ter place Mr. James Roberts, now of Naugatuck, Conn., 
sold in less than three months, without canvassing or ad¬ 
vertising outside the store, over 500 Washers, A tiling 
never before heard of. 
TO PERSONS OUT OF EMPLOYMENT 
we would say, if you warn to secure a paying business, now 
is vour time. Don’t wait till the best territory is taken up, 
but send at once for sample machine and go to work. By 
following instructions you can sell to nearly every family 
in your neighborhood. Others have done it, and there is no 
reason why you should not... Full directions, and instruc¬ 
tions accompany each machine. Also, special terms to 
agents, circulars, testimonials, &c. 
All orders must be accompanied with cash. 
Remit by money order or registered letter to 
THE GEO. D. BISSELL COMPANY, 
Naugatuck, Conn. 
