including even metals, water, and oil.

4. The invention of the non-magnetic versorium or electroscope.

5. The observation that merely warming amber does not electrify it.

6. The recognition of a definite class of non-electrics.

7. The observation that certain electrics do not attract if roasted or

burnt.

8. That certain electrics when softened by heat lose their power.

9. That the electric effluvia are stopped by the interposition of a sheet

of paper or a piece of linen, or by moist air blown from the mouth.

10. That glowing bodies, such as a live coal, brought near excited amber