No. 394. ] NOTES ON EVROPEAN MUSEUMS. 765 
jecting from the back of a wall case. The label, being then 
placed over the front of the shelf and projecting below it, 
hides any imperfection of the joint. 
The collection showing varieties of marble is large and com- 
plete, and is the only collection which I saw in Europe having 
the different varieties fully and accurately labeled. Another 
commendable feature of the labeling of these and specimens of 
building stones is the use of a supplementary label (of a yellow 
color) upon which are mentioned important buildings or works 
of art in the construction of which the different stones have been 
used. The only criticism I would ‘make on this collection is 
that the specimens are too small, being only 3 x 4 inches in size, 
to adequately represent the varieties. The marbles and build- 
ing stones form a part of a collection of structural material, all 
of which is arranged geographically and is divided into the 
groups of road material, paving material, raw material for 
bricks, mortar, sand, raw material for cement, building stones, 
decorative stones, roofing slates, and marbles. Introductory 
to the systematic rock collection is a so-called terminological 
collection, made up of the following: rock-forming minerals, 
rock structures (amorphous, crystalline, conglomerate), varieties 
of structure of crystalline rocks, varieties of structure of clastic 
rocks, modifications of stratified rocks, modifications of massive 
rocks, accessory modifications, inclusions, and rocks of sedi- 
mentary, eruptive, and metamorphic origin. The classification 
adopted for the systematic collection is that of Kalkowsky, as 
given in his Elemente der Lithologie. The specimens are of 
the uniform size, 3 x 4x1 inches, and are labeled as to locality 
and species. Supplementary to this collection are suites of 
rocks from different volcanic regions, such as the island of 
Teneriffe, Bourbon, and Vesuvius.. The great meteorite col- 
lection, which is not only the greatest of its kind in the world, 
but is also considered the most costly and valuable of any col- 
lection in the museum, is exhibited for the most part in floor 
cases of the uniform type, but some of the larger specimens 
are shown in two separate upright cases. The main collection 
is systematically arranged according to Tschermak’s classifica- 
tion. There are also several accessory collections which illus- 
