摘要：A description is given of a constant-head device capable of dispensing suspensions and solutions in an accurate manner in the laboratory and field. Tests have shown that the apparatus works to a high degree of accuracy without adjustment for prolonged periods of time and over a range of flow-rates. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (698K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 549 550 551 552 553 554
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