...Mr Dollond, and of which the three lenses that I have generally used, are of a 40th, 60th, and 70th of an inch focus. Many of the observations have been...appear to be spherical, or nearly so, and to be between l-20,000dth and l-30,000dth of an inch in diameter ; and that other particles of considerably greater...

...Mr Dollond, and of which the three lenses that I have generally used, are of a 40th, 60th, and 70th of an inch focus. Many of the observations have been...appear to be spherical or nearly so, and to be between l-20,000dth and l-30,000dth of an inch in diameter ; and that other particles of considerably greater...

...achromatic compound microscopes, either in my own possession, or belonging to my friends. The resuh of the inquiry at present essentially agrees with...appear to be spherical or nearly so, and to be between l-20,000dth and l-80,000dth of an inch in diameter ; and that other particles of considerably greater...

...the inquiry at present essentially agrees with that which may be collected from my printed account, P and may be here briefly stated in the following terms...appear to be spherical, or nearly so, and to be between l-20,000dth and l-30,000dth of an inch in diameter ; and that other particles of considerably greater...

...went on further to declare, under the head of "Additional Remarks on Active Molecules," that : — " The result of the inquiry at present essentially agrees...animalcules of infusions. That the smallest moving part'cles observed, and which I have termed Active Molecules, appear to be spherical, or nearly so,...

...a year latter he summed up his results as follows : That extremely minute particles of solid nutter whether obtained from organic or inorganic substances,...infusions. That the smallest moving particles observed appear to be spherical or nearly so, and to be between 1-20,000 and 1-30,000 of an inch in diameter,...

...later, went on further to declare, under the head of " Additional Remarks on Active Molecules," that : " The result of the inquiry at present essentially agrees...moving particles observed, and which I have termed aftive molecules, appear to be spherical, or nearly so, and to be between 1-20,000 and 1-30,000 of...

...interesting reference is made to Brown's paper in George Eliot's story, " Middlemarch," Book II, chap. xvn. for which I am unable to account and which from their...of some of the simplest animalcules of infusions. The smallest moving particles observed, and which I have termed active molecules, appear to be spherical,...

...solid matter, whether obtained from organic or inorganic substances, when suspended in pure water or some other aqueous fluids, exhibit motions for which...of some of the simplest animalcules of infusions." — Burton. The Brownian Movements have been by some considered as actual molecular movements, but...

...Mr. Dolloncl, and of which the three lenses that I have generally used, are of a 40th, 60th, and 70th of an inch focus. Many of the observations have been...appear to be spherical, or nearly so, and to be between l-20,000dth and l-30,000dth of an inch in diameter; and that other particles of considerably greater...