...In the dead mowana mentioned the concentric rings were well seen... 
David Livingstone 「Missionary Travels and Researches in South Africa」
...One was 4 feet 8 inches in diameter, and the wood must have been soft like that of the baobab, for there were only six concentric rings to the inch...
David Livingstone 「Missionary Travels and Researches in South Africa」
...At Niekerk, for instance,nine or ten hills are fortified on concentric walls thirty tofifty feet in number, with a place for the village at the top...
W.E.B. Du Bois 「The Negro」
...Theyexhibited concentric obtuse ridges on the interiorside, and a large basin-shaped area behind the hinge...
W. E. Webb 「Buffalo Land」
...The whole of this white yelk is not sharply separated from the yellowyelk, which shows a slight trace of concentric layers in the hard-boiled egg(Fig...
Ernst Haeckel 「The Evolution of Man」
...This ware was enrichedwith central heraldic arms, surrounded by concentric bands of foliage,arabesques, or inscriptions in blue, with a copper lustre...
Richard Glazier 「A Manual of Historic Ornament」
...TheCloaca Maxima is a tunnel roofed with two concentric rings of enormousstones, the innermost having an interior diameter of nearly fourteenfeet, the height being about twelve feet...
Hugh Macmillan 「Roman Mosaics」
...Two strongly marked, fret-like meanders encircle the vessel, theelements of which are ruled exclusively by the warp and woof, by theradiate and the concentric lines of construction...
William H. Holmes 「A Study Of The Textile Art In Its Relation To The Development Of Form And Ornament」
...It was pivoted in concentric rings which made up a set of gymbals far more elaborate than were ever used to suspend a mariner’s compass aboard ship...
Various 「Astounding Stories of Super-Science January 1931」
...Within it a series of concentric tissues were suspendedfrom metal rings, and in a trough outside ranged four stoppered flaskscontaining liquids of as many different colors...
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
...This disc is composed of twounfamiliar metals, arranged in concentric circles...
Various 「Astounding Stories, June, 1931」
...He was fullyarmed, dressed in the military uniform; but the former colonel was nowwearing on his shoulder straps the concentric rings denoting ageneral's rank...
Roman Frederick Starzl 「The Martian Cabal」
...There are at least two curved rows of minute stars a little beyond the periphery of the luminous whirl which clearly follow lines concentric with those of the nebulous spirals...
Garrett Serviss 「Curiosities of the Sky」
...Cassini discovered the dual nature of Saturn’s ring, having perceivedthat instead of one there are two concentric rings separated by a darkspace...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...On other occasions concentric arcs oflight are formed round the nucleus, one after another, getting fainteras they travel further from the nucleus...
Robert Stawell Ball 「The Story of the Heavens」
... call them Concentric Comets...
Edward Singleton Holden 「Sir William Herschel: His Life and Works」
...Experiments for investigating the cause of the colored concentric ringsdiscovered by Sir between two object-glasses laid one uponanother...
Edward Singleton Holden 「Sir William Herschel: His Life and Works」
...For as you penetrate the crust you getinside a concentric shell, which is thus powerless to act upon you, andthe earth you are now outside is a smaller one...
Oliver Lodge 「Pioneers of Science」
...Let us now return to the idea of dividing the space in which theuniverse is situated into concentric spheres drawn at various distancesaround our system as a centre...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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