An Electronic Drop Counter

Cell multiplication studied with an electronic particle counter.

Toennies, G. (Institute for Cancer Research, Philadelphia, Pa.), L. Iszard, N. B. Rogers, and G. D. Shockman. Cell multiplication studied with an electronic particle counter. J. Bacteriol. 82:857-866. 1961.-Suitable conditions are described for the application of the Counter electronic particle counter to the study of bacterial number and particle size distribution in growing cultures. When Str...

An evaluation of the Celloscope 401 electronic blood cell counter.

For counting erythrocytes the instrument was precise, with a mean coefficient of variation of 1.21%. Erythrocyte counts showed close agreement with results obtained on a Coulter A electronic counter of proven accuracy. When the Celloscope 401 was modified by the manufacturers to eliminate electrical interference from other laboratory equipment, satisfactory precision and accuracy for white cell...

Platelet counting using the Coulter electronic counter.

A method for counting platelets in dilutions of platelet-rich plasm using the Coulter electronic counter is described.(1) The results obtained show that such platelet counts are at least as accurate as the best methods of visual counting. The various technical difficulties encountered are discussed.

A Digital Electronic Ballot Counter Box

Little or no technological advancement, geometric increase in population, and manual counting process has made a democratic system practiced by developing countries of the world inefficient, slow and unattractive. To move away from this system, technology must be adopted to automate democratic process of voting. This paper describes the design and implementation of a digital electronic ballot c...

An electrical colony counter.