Lecture

 1 I  | consequence of the existence of certain forces, or abilities to
 2 I  |          we find that there are certain other powers (not many)
 3 I  |      discovered that there is a certain point in the middle of the
 4 I  | standing upright; and we may be certain, when I am tilting it over,
 5 I  |        upon the board behind me certain words, so as to recall to
 6 II |       attract each other with a certain power. If I hold it at a
 7 II |     this screen here, at B F, a certain amount of light falls on
 8 II |  attraction of cohesion is in a certain degree changed, for I will
 9 III|         is rapidly going off. A certain part of the water is actually
10 III|         of the ice, for below a certain temperature the particles
11 III|         become ice; and above a certain temperature the attraction
12 III|   temperature is increased to a certain point it becomes liquid
13 III|      the table) we shall have a certain amount of this new power
14 IV |        in so far as it gives us certain gaseous particles. Here,
15 IV |          I showed you yesterday certain qualities of this gas; now
16 IV |         see, I have no doubt, a certain amount of change. Look,
17 IV |       oxygen can do more than a certain amount of work. The oxygen
18 IV |         imbued with oxygen in a certain manner. I need not trouble
19 V  |     attraction of cohesion, and certain chemical attraction; but
20 V  |         the machine is turned a certain amount of electricity is
21 VI |      burn, that it takes, under certain circumstances, even less