Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
vessel in the direction ofher keel. By the rudder, F, the boat iskept in the proper direction to receive thewind upon the sail to the best advantagewith reference to the desired course. To apply these principles to the best ad-vantage, it is necessary that the boat be somodelled as to advance as… … MOTION AND FORCE. The Pendulum. 60. Figure 18.—Compensating pendulum..—A pendnlnmclock, to run with accuracy, requires that the pendulum remain alwaysthe same length ; but, as heat expands and coldcontracts it, it varies with the temperature (215).To overcome this variation is the object of…
Physics · Astronomy
Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-45-6.webp)
