378 ‘ «Analyses of Books. [May, 
tinent: and the.same obseryation applies to. the south temperate 
zones. A few musci, filices, and lichens, and monocotyledinous 
plants are common to the American torrid zone and to Europe ; 
but not a single bicotyledinous plant, as far as has been hitherto 
observed. Hence it would seem, that the distribution of the 
monocotyledinous and bicotyledinous plants is not subjected to the 
same law. 
In order to form a conception of the distribution of the different 
plants in each continent, it is necessary to know how the tempe- 
yatures vary in each. For this purpose M. Humboldt has con- 
structed the following table :— 
Georgia, Missisippi, Lower Egypt, Madeira. 
Lat. Mean Temp. 
‘Natches @eeeeeseeoees oe 1° 28’ eoveese oe 18:2° Cent, 
Punchalits Ks i> cleo BL. Did Oewes 20°4 Ther. 
QVOtAVE < weie/ek cans Selene ZO wey o> oh 
MEOH rete a ce Sic ciate gisiee ALT OG. cic eck 5 ceemnnicinan 
Algiers ....cceeeseees 36 48 ........ 2b 
——— 
Difference «......5 -7 9 2-3 
Virginia, Kentucky, Spain, South of Greece. 
Williamsburgh .......- 38° O ......44 145° 
MAOUTOGHUK op viescsseps 44. 50 wees sens 1G 
Montpelier ......2++-+5 43 36 ........ 15°2 
ROM ocicccvkies ccc ves 42 SD See cea eg, Rae 
Algiers ...ssceeeseees 36 48 1.00.0. QI 
— 
Difference ........5 7 9 44 
Pensylvania, Jersey, Connecticut, Latium, Rumelia. 
Philadelphia .........- S96 56" cl caeseed Ao 
New Vor’ 5. 7s Se ee 5: 40) AO eee ae Coe 
BOC VTAIOUS ve whee io v-c aon 0g.0) AO, CN oh cia.e tise tee 
ARES moe epi s'on oben 8 ocx att. Hales . RO. ce. 6 pen‘tanie ae 
Naples........ese0eee. 40 50 5.....05 17 —18 
—E, a 
Difteréfice: 3.5. s5ue00- 7 8 53 
Paswiely’, 04 260% 6.1004 APSE wel Oe 
Cambridge i.) 050. i042 08S WOES 
Wiensai peers Vie. Fes AO IP Bie OS 
Manheim ...... bie oS MOP BOUL IU Pe 
Wouldmataaass. bled et RO 
Romer We 4b! 58. Sec, ee 
—— 
Difference ........ 6 $0 6 
