...the protecting envelopes covering the youngMedusæ, usually arise in the angles of the branches formed by aprolongation of the sheath... 
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...138–142—Five diagrammatic longitudinalsections of the maturing mammal embryo and its envelopes...
Ernst Haeckel 「The Evolution of Man」
...The outermost and thickest of these envelopes is the whitesclerotic coat of the eye...
Ernst Haeckel 「The Evolution of Man」
...Symmetrical envelopes which, seen in section, appear as half circles or parabolas, rise sunward from the nucleus, forming a concentric series...
Garrett Serviss 「Curiosities of the Sky」
...At first the only substances thus discovered in them were hydro-carbon compounds, due evidently to the gaseous envelopes in which some combination of hydrogen with carbon existed...
Garrett Serviss 「Curiosities of the Sky」
...’ The corona surrounds the Sun and itsother envelopes to a depth of many thousands of miles...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...As the comet gets close to thesun its head becomes heated, and throws off concentric envelopes, muchof which consists of matter in an extremely fine state of division...
E. Walter Maunder 「The Astronomy of the Bible」
...But outside of and surrounding these parts is an envelope,or rather several envelopes, of much greater extent thanthe visible sun...
George C. Comstock 「A Text-Book of Astronomy」
...There were no envelopes...
Henry Lawson 「Children of the Bush」
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