{ 
Marcu 21, 1912| 
In the order of description the stratigraphical 
deposits may be scheduled as follows :— 
Trias ( Thaneétien 
Rheétien 2 | Sparnacien 
Hettangien 3 | Ypresien 
Sinémurien 2 | Lutetien 
Charmonthien = | Bartonien 
Toarcien | Ludien 
-2 | Bajocien 2 
#- Bathonien o { Sannoisien 
= | Callovien 3+ Stampien 
™ | Oxfordien =| Chattien 
Rauracien-Séquanien ° 
Kimeridgien » { Aquitanien 
Portlandien = | Burdigalien 
Neocomien 35 Helvétien 
Valanginien = | Tortonien 
Hauterivien lo as | Sarmatien-Pontien 
Barrémien * 
% | Aptien 5 [eR escce 
3 } Albien 35 Astien 
2 < Cénomanien oad | Sicilien 
@ | Turonien = 
UL | Sénonien Quaternaire 
Emschérien 
Aturien 
Danien 
Montien 
The geological nomenclature employed is 
mostly in accordance with that adopted in the 
late Prof. A. de Lapparent’s last edition of the 
“Traité de Géologie,” although among the Ter- 
tiary subdivisions we note the introduction of the 
new term “Chattien” for the inclusion of the 
Calcaire d’Etampes and the Meuliéres de Mont- 
morency, beds which are regarded as forming the 
youngest of the Oligocene series and which were 
previously recognised by authors as belonging tc 
the lowest Aquitanian rocks of the Miocene period. 
This is an adaptation of Fuchs’ “Chattischen- 
Stufe,” established for the Oligocene Sands of 
Cassel in North Germany, in which also was com- 
prised the Ormoy beds of the Paris Basin. Subse- 
quently M. G. F. Dollfus founded the name 
“Casselien”’ for the same horizon, but afterwards 
altered it to ‘“‘Kasselien.” On account of priority, 
therefore, we gladly support M. Lemoine in his 
recognition of “Chattien.” 
Students will appreciate the nine well-executed 
coloured geological maps that accompany this 
volume, as well as the numerous smaller maps 
and sections, showing considerable detail, which 
are inserted as text figures. The first of the 
coloured maps gives a general idea of the limits 
of the formations; a second is illustrative of the 
tectonic lines of the region; another depicts the 
areas where the lower ‘Jurassic rocks are de- 
veloped; a further map shows the marginal lines 
of the Sequanian, Portlandian, and Neocomian 
beds; in a fifth we have displayed the depth and | 
| lower layers were determined by means of kites; 
‘altitudes of the Albian deposits; the next three 
explain the position of the Thanetian, Sparnacian, 
‘and Lutetian rocks, the remaining map exhibiting 
‘the regions of the Sannoisian and Aquitanian 
‘ NO. 2212, VOL. 89] 
NATURE 
57 
beds. We think that the introduction of some 
illustrations of characteristic fossils would have 
been an advantage, and we are likewise of opinion 
that one analytical index, to include localities, 
genera, as well as species, names of deposits, 
and every other item of importance, would have 
been preferable to the two indices given, which 
only affect specific names and localities. A pro- 
perly prepared index is known to be an expensive 
matter in the publication of a reference wori, but 
its existence is of supreme momert to the student 
and professer alike, who, without wading through 
an extensive “Table des Matiéres,” frequently 
require to make rapid reference into the geology 
of a district, the distribution of a fossil, particulars 
of a rock structure, or to some problem of tectonic 
interest. 
Dae book, however, contains a mine of Tine 
tion; it is excellently printed, the black-typed 
headings to the paragraphs giving a great clear- 
ness to the text, and we strongly commend it to 
all geologists interested in the structure of this 
region of France. Re BN. 
WIND CHARTS OF THE ATMOSPHERE. 
Charts of the Atmosphere for Aeronauts and 
Aviators. y A. Lawrence Rotch and A. H. 
Palmer. Pp. 96+24 charts. (New York: John 
Wiley and Sons; London: Chapman and Hall, 
Ltd arom) Ss. od net 
| “THIS volume contains twenty-four charts, with 
accompanying text, dealing mainly with 
average wind conditions from ground level up to 
30,000 feet, at the observatory at Blue Hill, Mass., 
of which Prof. Rotch is the founder and director, 
and at St. Louis. The book is intended for the 
use of airmen. and its aim is “to extend the work 
on surface winds and ocean currents done by 
Maury to the regions with which the navigator 
of an air-craft is concerned.” The arrangement 
of the work, whereby all the charts appear on 
the right-hand page of an opening, and the corre- 
sponding descriptions on the page immediately 
opposite, is very convenient, and the clearness 
of the diagrams is enhanced by the absence of 
printing on their reverse sides, although this 
involves alternate blank openings like an atlas. 
Chart 1 shows heights of clouds, and maximum 
heights attained by different species of air-craft. 
In Chart 2 is shown, inter alia, the average rela- 
tion between wind velocity and height up to 
30,000 feet at Blue Hill. The velocities in the 
in the upper layers by means of theodolite 
observations of clouds, which took place “almost 
daily during two years.” The curve exhibits an 
