[513] Black. Joseph Black, a Scotch chemist who made valuable discoveries about latent heat and carbon dioxide, or carbonic acid gas.
[514] The astronomers said, etc. Beginning with this passage, several pages of this essay was published in 1844, under the title of Tantalus, in the next to the last number of The Dial, which Emerson edited.
[515] Centrifugal, centripetal. Define these words.
[516] Stoics. See "Stoicism," [331].
[517] Luther. (See note [188].)
[518] Jacob Behmen. A German mystic of the sixteenth century; his name is usually written Boehme.
[519] George Fox. (See note [202].)
[520] James Naylor. An English religious enthusiast of the seventeenth century; he was first a Puritan and later a Quaker.
[521] Operose. Laborious.