The average volume composition of the gases of the atmosphere may be represented (in parts per 10,000) as follows: In addition to these gases, there are always present in the atmosphere many micro-organisms or bacteria (see Bacteriology); another invariable constituent is dust, which plays an important part in meteorological phenomena.
It had an invariable habit of digging a hole in the ground, into which it crawled backwards, remaining there all day with only its nose and ferrety eyes visible.
Near affinity; and while more nearly related to the Marsupialia (q.v.), in which an imperfect allantoic placenta is sometimes developed, it is broadly distinguished therefrom by the invariable presence of a functional placenta by the aid of which the foetus is nourished throughout the greater portion of intra-uterine life.
Other virtues were all his own, his extreme gentleness, his love for children, his flawless honesty, his invariable kindliness, his chivalry to women and the weak.
The invariable line OH describes another cone in the body, called the invariable cone.
The invariable moisture of my hair, while plunged in deep thought, after six cups of hot tea in my thin shingled attic, of an August noon; this seems an additional argument for the above supposition.
Whenever the crocodile is out of the water the spur-winged plover is its invariable companion.
In the case of any bacterium discovered, observation must be made in a long series of instances in order to determine its invariable presence.
Such a body, in free space, not acted on by any force except the attraction of its several parts, will go on rotating for ever in an invariable direction.
H.) simplicity of the first experiments, pointing apparently to the conclusion that each element had its characteristic and invariable spectrum whether in the free state or when combined with other bodies, was soon found to be affected by complications which all the subsequent years of study have not completely resolved.