. The American journal of tropical medicine. d applications forcopies of the journal should be addressed to Messrs. Thacker, Spink & Co., P. O. 54, Cahutta, to whom also subscrip-tions should be paid. Contributors will receive SO reprints of their papers free and additional copies at cost price up to a limit of 100. Applicationsfor reprints should be made at the time of returning the final proof. The Terms of subscriptions are six rupees per annum, payable in advance; foreign subscribers seven rupees eight annas,including postage; single issues are two rupees, each. nr u A r^ IT T? D c t&
. The American journal of tropical medicine. d applications forcopies of the journal should be addressed to Messrs. Thacker, Spink & Co., P. O. 54, Cahutta, to whom also subscrip-tions should be paid. Contributors will receive SO reprints of their papers free and additional copies at cost price up to a limit of 100. Applicationsfor reprints should be made at the time of returning the final proof. The Terms of subscriptions are six rupees per annum, payable in advance; foreign subscribers seven rupees eight annas,including postage; single issues are two rupees, each. nr u A r^ IT T? D c t> t xt ir a.^ r^ d v- o. box 54, Calcutta, 1 rl/\ l^ JV r!y K, ^J^liMJS. CX ^^ V>l., and Regent House, SIMLA. THE AMERICAN JOURNAL OF TROPICAL MEDICINE AMERICAN STANDARD HAEMACYTOMETERS WITH LEVY COUNTING CHAMBER The Levy Counting Chamber was announced in November, 1916, patented January 31, 1917 (U. S. Patent No. 1,214,331) and was awarded the Edward Longstreth Medal of Merit by the Franklin Institute, Philadelphia, December, 1917. No. 3351. American Standard Haemacytometer with Levy Counting Chamber with double Neubauer ruling THE LEVY COUNTING CHAMBER was the first dependable Haemacytometer CountingChamber made in the U. S. and continues to be superior in several important characteristicsto any chamber yet made either in Europe or America. Approximately 20,000 are now in use,without a single rejection because of inaccuracy. It provides an increased visibility of ruling when the chamber is filled, unequalled by anyruling of European make, and a new method of construction of the parallel form of cell (firstsuggested by Blirker) which entirely avoids the cemented cell of the Thoma or Biirker con-struction with the attendant danger of separation from the slide. The parallel or open form of chamber permits the filling of the ruled area on the cover-glassby capillary attraction after the cover-glass is in position on the slide, and provides a moreuniform distribution of the c
Size: 1765px × 1415px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttropica, bookyear1921
