Elihu Root Collection of United States Documents Relating to the Philippine Islands Volume 5 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 Excerpt: ...the organisms may be circular or oval in shape, if arrested while in motion may lie irregular. It is more refractive than other cells occurring in the feces, with the exception of the monads, and the protoplasm has a peculiar faintly greenish hue, almost like that of certain malarial crescents. Its size varies greatly, from 5// to 35// in diameter, but most of the arrncba? seen ordinarily measure from 15// to 25// in diameter. While many authorities claim that the amoeba? seen in any one case are all about the same size, this has not been my experience, and in the cases cited War 1900--Vol. 1, Pt n 61 above the amoebae differed widely, some being very large, others small. The shape, also, varies much, some being perfectly circular, others oval, and others irregular in shape. As ordinarily described, the organism is said to consist of two parts, an inner, granular portion, called the endoplasm, and an outer portion, called the ectoplasm. This description has been the cause for mistaking the organism for large cells, the inner portion corresponding to the granular nucleus and the outer portion to the protoplasm. As a matter of fact, this differentiation can not be made out in all cases by any means, and very seldom in an amoeba, which is not motile. While doubtless the two portions mentioned exist, yet too much stress is laid upon them, resulting in confusion, as only the exjerieneed observer can in most instances distinguish them. The organism possesses a nucleus, but this is often difficult tomakeout, especially in moving amtcbie. It is situated somewhat to one side and is very refractive J its outline is often more or less irregular. The endoplasm forms most of the substance of the organism, is of a peculiar faint greenish hue, very finely granular, resemb...