column-reading chainomatic analytical balance
Datecirca 1922
Inventory Number1996-1-0207
ClassificationBalance
Subject
Maker
Eimer & Amend
1851 - 1940
Cultural Region
Place of Origin
Dimensions46.5 x 24 x 43 cm (18 5/16 x 9 7/16 x 16 15/16 in.)
Material
Accessoriesset-up instructions; weights; corked glass viles; tweezer; magnifying glass
DescriptionA wooden case with windows inside of which is a balance consisting of a vertical brass pillar that holds a balace beam from which hang two flat metal pans on metal bows. The beam has attached to it a long needle pointer that reaches down almost to the base to a scale without numbers. There is a horizontal rod extending from left to right above the beam with a clamp that reaches down to the beam, and which can be manipulated from the outside to the right. There is also a vertical ruler marked "MILLIGRAMS" with a scale from 0 to 100 going downwards. Next to it is a vernier that can slide up and down the ruler and which has attached to it a chain that falls into the right-side pan.
The case includes a drawer full of accessories (see accessories) plus two knobs in front, and an additional crank on the right side near the bottom.
The case includes a drawer full of accessories (see accessories) plus two knobs in front, and an additional crank on the right side near the bottom.
Signedplaque on top front of case: EIMER & AMEND NEW YORK, N. Y., U. S. A.
below pointer scale: EIMER & AMEND / NEW YORK
FunctionThis is an analytical balance that is designed to make the determination of the last decimals of a weight measurement much quicker. Up to a range of around 0.1 gram, it works like any other balance, with the user having to open the door and place new weights repeatedly. Then, instead of using finer weights, the user can gradually lower the chain onto the tray by sliding the vernier up or down. When the system is balance the user can simply read the milligrams off the ruler's scale, even up to the scale on the vernier if necessary.
Historical AttributesPrecision balance purchased by Prof. Clifford Frondel when he was twelve years old. Used by him throughout his schooling. Donated by Frondel to the Collection on April 2, 1992.
American Balance Corporation
Date: circa 1960
Accessories: brush; aluminum blocks
Object number: 1996-1-0204
L. Oertling
Date: 1880-1940
Accessories: fitted wooden block with Eimer and Amend weights; two fitted boxes of weights (mahogany); simple wooden case of small weights with sliding top; weights stuffed in a cardboard box labelled "J.B. Prescott"; miscellaneous parts in a brown cardboard box; one brass dial knob; two identical brass pieces (red, black and brass) of unknown use; a round, flat glass tray that hangs from three strings; additional perforated pan with stirrup; two glass floats in a cardboard box; cylindrical float in a black cylindrical cardboard case; black tweezer; page from Gaertner Scientific Corp., page 4, "T1005. Analytical balance" now in instrument file folder (a different make and model); paper note with following note: Water dispat 60° / 12.3535
Object number: 1996-1-0412
Herman Kohlbusch Balance Company
Date: 1860-1880
Accessories: box of weights; accessories and spare parts for balance
Object number: 1998-1-1661
Crosby Steam Gage & Valve Company
Date: circa 1903
Accessories: instruction manual; letter from company; one gallon can of oil (2002-1-0100)
Object number: 1998-1-1618
E. Mettler AG
Date: 1955-1965
Accessories: instruction manuals
Object number: 1996-1-0203
Keller Manufacturing Company
Date: 1900-1920
Accessories: two tweezers; a small box of fractional weights; two colored carboard boxes; a small metallic case; four small cylindrical boxes; a convex circular piece of glass
Object number: 2004-1-0332
Carl Zeiss Jena
Date: circa 1926
Accessories: wooden box with two hook-and-eye latches to fasten front opening; in instrument file: instruction book (photocopy); Geissler tube labeled "H2"; carboard tube containing German thermometer C in stainless steel holder that screws into instrument; glass bottle with cork stopper labeled "Monobromnaphthalin, Germany nD=1 658"; small round cardboard box labeled "For Pulfrich Refractometer" containing one tubulure
Object number: 1996-1-0229
Christian Becker
Date: circa 1900
Accessories: in the drawer is a small box of weights, as well as two cards giving instructions for use
Object number: 2004-1-0308
John Bleuler
Date: circa 1790
Accessories: wooden storage case
three ivory tiles fallen off the instrument
two original curatorial cards
Object number: DW0454