(_i.e._
after the 5th half-foot):

[Greek: Menin a | eide, the | a, | Pe | leia | deo Achi | leos]
Arma vi | rumque ca | no, Tro | jae qui | primus ab | oris.

Another caesura very common in Homer, but rare in Latin verse, is after the
2nd syllable of the 3rd dactyl:

[Greek: Oio | noisi te | pasi Di | os d' ete | leieto | boule.]

On the other hand, the hephthemimeral caesura (_i.e._ after the 7th
half-foot) is common in Latin, but rare in Greek:

Formo | sam reso | nare do | ces Ama | ryllida | silvas.

The "bucolic" caesura, peculiar to Greek (so called because it is chiefly
found in writers like Theocritus) occurs after the 4th dactyl:

[Greek: Andra moi | ennepe, | Mousa, po | lutropon, | hos mala | polla]

In the pentameter verse of the elegiac distich the caesura is always
penthemimeral. In the iambic trimeter (consisting of three dipodia or pairs
of feet), both in Greek and Latin, the most usual caesura is the
penthemimeral; next, the hephthemimeral:

[Greek: O tek | na Kad | mou tou | palai | nea | trophe]
Supplex | et o | ro reg | na per | Proser | pinae.

[v.04 p.0945] Verses in which neither of these caesuras occurs are
considered faulty. On the other hand, secondary or subsidiary caesuras are
found in both Greek and Latin; thus, a trithemimeral (after the 3rd
half-foot) is combined with the hephthemimeral, which divides the verse
into two unequal parts. A caesura is often called masculine when it falls
after a long, feminine when it falls after a short syllable.

The best treatise on Greek and Latin metre for general use is L. Mueller,
_Die Metrik der Griechen und Romer_ (1885); see also the article VERSE.

CAFFEINE, or THEINE (1.3.7 trimethyl 2.6 dioxypurin), C_8H_{10}N_4O_2.H_2O,
a substance found in the leaves and beans of the coffee tree, in tea, in
Paraguay tea, and in small quantities in cocoa and in the kola nut. It may
be extracted from tea or coffee by boiling with water, the dissolved tannin
precipitated by basic lead acetate, the solution filtered, excess of lead
precipitated by sulphuretted hydrogen and the filtered liquid then
evaporated to crystallization; or, tea is boiled with water, and the whole
then evaporated to a syrup, which is mixed with slaked lime, evaporated to
dryness on the water-bath and extracted with chloroform (P. Cazeneuve,
_Bull. de la soc. chim. de Paris_, 1876-1877, 27, p. 199). Synthetically it
may be prepared by the methylation of silver theobromine and silv