On the micrometric numeration of the blood-corpuscles and the estimation of their haemoglobin / by Mrs. Ernest Hart.

  • Hart, Mrs Ernest, 1848-1931.
Date:
[1881]
Catalogue details

Licence: Public Domain Mark

Credit: On the micrometric numeration of the blood-corpuscles and the estimation of their haemoglobin / by Mrs. Ernest Hart. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    DUCTED CORPUSCLE-COUNTER with WET CHAMBER (Compte- Globules a chamhre humide graduee micrometriqueT) consists of a thick nickel slide, in the centre of which is a circular groove enclosing a glass cylinder about a centimeter in dia- meter. Outside this groove are three pointed metal screws, equidistant from each other. The elevation of these points above the surface of the metal slide is exactly i mm. In the centre of the glass surface, limited by the groove, are drawn the squares, in which the corpuscles are counted. These have a side of 20 mm., and they are arranged ingroups of 20, each group having a length of -2%=] mm., and awbdth of -fo mm., and an area, therefore, of square Fig. 2. • ©° <9 © o © O ^ 90 O' • /o r o ® © < o ® 0 © © © 9 © © o e © *•; 9 & 0 A 9 © ° °J © 0 O © 1 © t 9® o' / <D © © © © © e 9 ® © <s> e © o © © • © © © © • \ o © © © © 0 ® © « e © » 0 O © o © « © \ © a © V © © r. r © © • * © 0 ° © » •S. 0 o • o © e 0 ^0 © © • c ®t® ®© CJ © « © t 1 © » e O 9 ° 0 o c a ^ & © o © I© 1 © ge *1 © t © ® * > 3 L4 A • © © Q9 © o o © © 9 C • o © © © e < < ,®° ° © * o - ° © r \ o| 1c % 1 0 © » © © ® ••• !? © © ® © a © ^ © 9 © © * ° © • © © © © a @® © £> O o ©9 * o a c < © ® E. P® c 0 © ol © 0 0 Y © © • © « s a 6 ) ) © © e © <© • 0 a * • § © © © , © ® © © o v9 0 © © • t © © a ® - o © • a ®© O © © 0 :*j m C Q (£ 9 « > © o c 1 ® & # \ ® V ^ #A 0 e < & e 5 O 0 ft • ® © 0 O 0 a-®- o e 0 0 •V 9 ©' © £ © ° > 0 c 0 0 o / 1 / V® ° s i © © ° ® Q © © © 0 © © ° © 0 © 0 © C© * « o 0 Q © 0 9 o e ® o> © ® € 9 © ' © ® 0 © 9 mm. Each group of 20 squares is separated from ad- joining groups by a double line (Fig. 2). The peripheral 1 “ Sur les Perfectionnements les plus recents apportds aux Methodes et aux Appareils de Numeration des Globules San^uins, et sur un nouveau Compte-Globules,” par L. Malassez, ‘Arch, de Phy.’
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