...While these subtle forces have generallyfollowed the natural cleavage of common blood, descent and physicalpeculiarities, they have at other times swept across and ignored these... 
W. E. Burghardt Du Bois 「The Conservation of Races」
...The enormous cleavage of the rocks, the appalling cracks and fissures, the rent boulders, the smitten granite floors, gave one a new sense of the power of heat and frost...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...At the commencement of the cleavage itgathers at the equator of the cell, between the stellar poles, and forms acrown of U-shaped loops (generally four or eight, or some other definitenumber)...
Ernst Haeckel 「The Evolution of Man」
...This is done by the simple process of cleavage (Fig...
Ernst Haeckel 「The Evolution of Man」
...The inert mass of the passivefood-yelk is solarge in these cases that the protoplasmic contractions of the active yelkcannot effect any further cleavage...
Ernst Haeckel 「The Evolution of Man」
...40—The cleavage of the frog’s ovum(magnified)...
Ernst Haeckel 「The Evolution of Man」
...The cleavage of the stem-cell (Fig...
Ernst Haeckel 「The Evolution of Man」
...Next, each of thefour upper ones divides into two halves by a cleavage beginning from the northpole, so that we now have eight above and four below (Fig...
Ernst Haeckel 「The Evolution of Man」
...The cleavage surfacesbetween the segmentation-cells appear at the free surface of the tread asclefts...
Ernst Haeckel 「The Evolution of Man」
...At this spotwe have the most brisk cleavage of the cells; hence the cells are more numerousand smaller here than in the fore-half of the germinal disk...
Ernst Haeckel 「The Evolution of Man」
...In these thegastrulation proceeds in two phases, as Semon rightly observes: firstly,formation of the entoderm by cleavage at the centre and further growth at theedge; secondly, invagination...
Ernst Haeckel 「The Evolution of Man」
...In the latter, before thecommencement of the gastrula-folding, we have, at least at the periphery, atwo-layered embryo forming from the cleavage...
Ernst Haeckel 「The Evolution of Man」
...We have, in thefirst place, the peculiar feature that the two first segmentation-cells thatproceed from the cleavage of the fertilised ovum (Fig...
Ernst Haeckel 「The Evolution of Man」
...; the formative yelk alone undergoes cleavage...
Ernst Haeckel 「The Evolution of Man」
...A phytomoneron, the round plastids of which(bluish-green in colour) secrete a shapeless gelatinous mass; in this theunnucleated cytodes increase continually by simple cleavage...
Ernst Haeckel 「The Evolution of Man」
...In the genealogical treeof the Vertebrates this palingenetic form of segmentation has been preserved inthe Amphioxus alone, all the other Vertebrates having cenogenetically modifiedforms of cleavage...
Ernst Haeckel 「The Evolution of Man」
...In cleavage the two products are equal in ageand morphological value...
Ernst Haeckel 「The Evolution of Man」
...Since the lines of cleavage are so widelydissimilar in the two cases, both methods of study are necessary to acomplete understanding of a picture...
Estelle M. Hurll 「The Madonna in Art」
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