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The direction of the arrows in plan and longitudinal section, will explain the direction of the smoke current. Q. Is this arrangement different from that obtaining in tubular boilers? A. In tubular boilers, the smoke after leaving the furnace just passes once through a number of small tubes and then enters the chimney.
Immediately after their formation the two coelom-pouches of the Amphioxus are divided into several parts by longitudinal and transverse folds. They have a different future above and below. The upper or dorsal segments, the episomites, lose their cavity later on, and form with their cells the muscular plates of the trunk.
On the N.E., N., and N.W. it is still lower and narrower; so much so, that it is only for an hour or so after sunrise or before sunset that it can be traced at all. On every side, with the exception of the curved piece on the S., the wall consists of linear sections. The interior contains a great number of little craters and very low longitudinal mounds.
Theory would assign, as the shape of highest rapidity, one like that which would be made by the revolution of the waterline section of a fast ship on its longitudinal axis; and supposing the force to have been applied, this would doubtless be capable of the greatest speed; but the rifle-missile must first be fitted to receive the action of the powder in the most effective way.
When fresh caught from the sea the body is yellow of various shades, striped and spotted with vivid blue on the head; the dorsal fins are pale brown with dark longitudinal bands; the ventral, caudal, and anal fins being bluish-black.
While, to speak figuratively, the minute anatomy of consciousness is thus difficult with respect to longitudinal sections of the mental column, it is no less difficult with respect to transverse sections.
On longitudinal section of a long bone during the active stage of the disease, the marrow is seen to be replaced by a vascular young connective tissue which encroaches on the surrounding spongy bone, reducing it to the slenderest proportions; the formation of bone from the periosteum does not keep pace with the absorption and replacement going on in the interior, and the cortex may be reduced to a thin shell of imperfectly calcified bone which can be cut with a knife.
The trouble was to make the thing contractile. This I sought to do by fixing a long, fine-meshed silk net over it that was fastened to be rolled up on two longitudinal rods. Practically I contracted my sausage gas-bag by netting it down. The ends were too complex for me to describe here, but I thought them out elaborately and they were very carefully planned.
These arches are built largely of bones, but are given that springy, elastic curve on which their health and comfort depend, and are kept in proper shape and position, solely by the action of muscles those of the lower part of the leg and calf. The absence of impression on the inner border of the normal footprint at A is due to the elevation of the foot by the longitudinal arch.
The Wright machine got its longitudinal stability by means of the main planes and the elevating planes, while the Voisin type added a third factor of stability in its sailplanes. Further, the Voisins fitted their biplane with a wheeled undercarriage, while the Wright machine, being fitted only with runners, demanded a launching rail for starting.
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