The dark bean-shaped cells are the normal blood corpuscles, and the few speckled cells are those infested with the malarial parasites. Edward W. Byrn.十九世纪发明进展.
The illustrations represented in Fig. 177 show the parasites that cause malaria, or fever and ague. Edward W. Byrn.十九世纪发明进展.
Commencing his great work about 1865 with the investigation of the silk worm plague in France, he discovered it to be due to parasites, and checked it. Edward W. Byrn.十九世纪发明进展.