CONTENTS. 
Page 
Scale: Of Mi Sets 2s Sees eee ete np phe ee oe EN eS eee ee ek 7 
AN CephiOn Sandie Slo tye ee eee tee eae ee ee ee ee 9 
WHELALIONS TO feihl Cm y Cai ee =e ere ee re ee ee 15 
FATTO PLLA Oi Spee ee err ede ea ee ee ee aes ee) es 15 
Bulging Seandieq up mien bis = nee ee oe ees ee ee 16 
CONIC CEL OTIS ee eee es ee Pe es ee 18 
Breen ColleetiOns: 23 tasers ew Se ee Sie Pee oe 19 
Moebycolleetiony o£; chemical sty pesss = 22 a= es ee 20 
Cooperation of the executive departments_______-_______ 20 
Partello bequest___- hee Se a A he ee See ee es ee 20 
VAT SS IT OTS ere nes © Sen Se ee ee ae ee 21 
ETCH GOT Sener ae et as Sees eee ie ee ee Ea Ne oes ree 23 
VACA OWES Wg =e A pa oe Ee a oT 9 A Es ea a 23 
nO Locra pice lavOra Oly = ee ani Se 24 
MEETING Sean OWCONCTCSSCG == s.. 8 ee ete 2 2 ee a 24 
OPAC OM TVG eS Gel Mies ea 3 a ee ee 32 
BORE a ent oy AUeMROpOIOBY — ee 
Reports on the collections : by Walter Hou ting Head Curator 39 
Department of biology, by Leonhard Stejneger, head curator_______~ 47 
Department of geology, by George P. Merrill, head curator_________- $1 
Department of arts and industries, W. deC. Ravenel, director: 
Textiles, medicine, woods, and foods, by F. L. Lewton___________ 97 
Mechanical technology, by Carl W. Mitman____________________ 115 
Mineral stechnolozy.by, Carl W-.Mitman—-=- 2 eae AT 
Graphicsaniss Dyelvwhee OMNI. = es eee eee 23 
Division OL historyby os Belote; curator. 2-"-=-2-- 5-5 =e ee 131. 
TENS TARO tC CESS 1 On see ee ernie tie Ree ae ae ee ee ee ee Se ee 1438 
IIS eOf PUM CALLOUS Se te ere meer e es eS a ee ee 199 
ILLUSTRATIONS. 
South front of Natural History Building of the Museum____---~-_~ Facing title 
Skeleton of smallest horned dinosaur, Brachyceratops montanensis, from 
Montana. Collected in 1913; mounted during 1920 and 1921. Facing 
Cee Hs ON Cee ay ees DROS a oe 51s hee spa Beene SS Petre eae oe Oo 90 
Skeleton of an extinct bear from a Pleistocene Cave deposit near Cumber- 
land, Md. Collected in 1915; mounted during 1920 and 1921. Facing 
