...a,iid leave successive moraines, especially terminal ones. In the view of Prof. Forbes, a glacier ь an imperfect fluid, or a viscous body, which is urged down slopes, like a river, by the mutual pressure of its parts. The ice is not inflexible, but more or less plastic,...

...Prof. Forbes, quoted by Tyndall, originally was the following : " A glacier is an imperfect fluid, or viscous body, which is urged down slopes of a certain inclination by the mutual pressure of its parte." This " Viscous Theory," he illustrated by the motion of honey, treacle, tar, moist mortar,...

...valley towards which it turns its " convex boundary." Professor Forbes, therefore, regards a glacier as an imperfect fluid or a viscous body, which is urged...certain inclination by the mutual pressure of its parts. But the whole question is one of too purely scientific a character to be discussed in these pages....

...variations of glacier-motion. Comparing that motion to the flow of a river, he propounded the theory that " a glacier is an imperfect fluid or a viscous body,...inclination by the mutual pressure of its parts." The observations and journeys which led him to this deduction are detailed in his " Travels in the...

...and a close examination of their phenomena, came to the following conclusion with regard to them. ' A glacier is an imperfect fluid, or a viscous body,...certain inclination by the mutual pressure of its parts1." The consistency to which reference is here made, is illustrated by the example of thick mortar,...

...Theory." This theory is shortly expressed by himself in these words: "A glacier is an imperfect fluid or viscous body, which is urged down slopes of a certain...inclination by the mutual pressure of its parts." Tyndall has since sufficiently exposed its weak points. It must be conceded that the term " viscous...

...variations of glacier-motion. Comparing that motion to the flow of a river, he propounded the theory that " a glacier is an imperfect fluid or a viscous body, which is urged down slopes of ¡i certain inclination by the mutual pressure of its parts." The observations and journeys which led...

...variations of glacier-motion. Comparing that motion to the flow of a river, he propounded the theory that " a glacier is an imperfect fluid or a viscous body, which is urged down slopes of ¡i certain inclination by the mutual pressiire of its parts." The observations and journeys which...

...of glaciers is briefly this: — He affirmed a glacier to be a viscous body, ie, an imperfect fluid, which is urged down slopes of a certain inclination by the mutual pressure of its parts. Viscosity was illustrated by the consistency of thick mortar, tar, or mixtures of plaster and glue....

...(Travels, p. 365), where he finally sums up his ideas : — 'My theory of Clacier Motion then is this : A GLACIER is AN IMPERFECT FLUID, OR A viscous BODY,...INCLINATION BY THE MUTUAL PRESSURE OF ITS PARTS.! These, again, may be accepted even now as a nearly complete statement of the physical circumstances...