By Daniel Bernoulli, David Speiser, Patricia Radelet-de Grave, André Englebert
The 1st a part of this quantity facilities on Daniel Bernoulli's prize-winning essays despatched to the Paris Académie des Sciences within the 1740s. the 1st of those papers bargains with the advance of inclination compasses, giving an in depth research of the explanations for the good deviations saw in traditional tools and suggesting replacement buildings; the second one, written in collaboration with Daniel's brother Johann II Bernoulli, expounds a concept of magnetism in response to Cartesian vortices of sophisticated subject. furthermore, a prospectus during which Bernoulli recommends a Basel craftsman's horseshoe magnets, and a number of other manuscripts when it comes to magnetism are revealed and commented on. An appendix collects the few assets that point out Daniel's profession with the speculation of electrical energy. simply because he didn't post his perspectives in this topic, his conjecture of the 1/r2 legislations of electric charm ("Coulomb's Law") remained mostly unknown. the second one a part of the quantity is devoted to Daniel Bernoulli's paintings at the expertise of time measuring, particularly in connection to the choice of longitude at sea - an issue of serious sensible value. additionally this part includes prize essays submitted to the Paris Academy. the 1st one from 1725 attempts to enhance at the regularity of hourglasses, a tool already out of date on the time. the second one essay from 1745 indicates new tools for the development of pendulum clocks and for his or her software to the matter of longitude; its major value lies, back, within the systematic research, according to mechanical first rules, of the resources of errors.