November 2, 1891.] 
THE TROPICAL AGRICULTURIST. 
301 
Kial, at London, and at Paris, and in each instance 
received the highest award. It comprises about one 
hundred and fifty tons of rare minerals, and the 
exhibit occupies 0,000 square feet of fpicc. At the 
Chicago Exposition one of the pavilions for this ex- 
hibit will bo made of glittering mica, which will be 
procured in South Dakota. Among the additions 
to the collection is a mass of meteoric iron, weighing 
230 pounds, which the professor found in Arizona 
recently, lie sent a specimen of this to Professor 
George A. Koenig, of the University of Pennsyl- 
vania, who discovered in it black diamonds visible 
to the naked eye. This discovery is now to 
mineralogists and of CTeat interest. In 1^88 a meteor 
fell in Russia, in which the soiontists discovered 
microscopic evidence of diamonds, but this Arizona 
meteor is the hrst to show the diamond formation 
to tho eye. 
Professor Poote will ulso show some entirely new 
copper specimens from Arizons, and a stalagmite 
tree, formed by limesboue urippiugs from a mine in 
Now Mexico, lie will show tho big garnets which 
ho collected in Colorado, some of which are perfect 
speoinicDs and above six pounds in weight. Ho has 
recently collected the Aneet specimens of oeletnanite 
ever found, lu the professor’s ooHcotion are all of 
the gems, rough and aut diamouds, rubles, topazes, 
opals, etc. His collection from the PaciAo coast of 
America shows the wulfenite, a rare species of orange- 
rod crystals; tho brilliantly red vansdiuitos, and 
bright crjstal of szurite, assooiated with velvet tufts 
of malachite. Alaska shows the deep red garnets, 
ill their dull coats of mica schist. There in silver 
ore from tho famous Bridal Chamber in New Mexico. 
It is said that a space the size of a bed-room, In this 
mine, produced $500,000 worth of silver. There in a 
precious turquoise from Loe Cerrillez, New Mexico, 
whore Moutizuma got his ptociuuB ohalchuLutils, 
which he valued obove gold. There are blende.s and 
galenas from the zinc rrgion of Lake Superior, From 
tho North Atlantic coast region is nhowu rhodonite, 
in hue crystals which is much used by the Kussisns 
io ornamental work. From tho New Jersty mines 
come minerals found nowhere else in the world— 
franklinite— name 1 after the philosopher— anomolito, 
trooslite, blood rod zincite, etc. The South Atlantio 
coast region shows amethyets, sapphires, aquamaiincs, 
urauolite, etc. 
In its exhibit at the World’s Fair tho government 
geological survey will place on view a sort of sj'Qoptic 
piotnro of the mineral resources of this country. 
Big chunks of native gold and silver will be shown 
just as they were dug out of the earth, together 
with remarkable ores of all sorts, particularly those 
of what are called ** economic minerals,” snob as Iron, 
copper and tin, Acoumpanjing the.te will be maps 
drawn for the purpose of aseUliog the illustratiun. 
Several skilled colleotors are soon to be sent out with 
iustructiouB to gather in everything in tho mineral 
line that is worth displaying. Professor Clarke, the 
distinguished chemist and mineralogist, hsa been given 
charge of the whole matter, and he is gotting together 
a wonderfully fine assemblage of precious and semi- 
precious stones also, which will form part of tho 
display. This collection, although it will bo largely 
composed of gems found in the United States, will 
not be limited to those. Dozens of big boxes and 
trays full of such jewels of all sorts arc at present 
being set in order for the purpose at tbe national 
museum. There are topazes, emeralds, rubies, diamonds, 
opals and every other kiud of beautiful sparkler. 
Also these are so many curiosities, such as metals 
compounded in raro fashions in nature’s laboratory — 
tor example, bromide of silver and crjstalized 
carbonate of copper. Examples will be shown illus- 
trating the strange rules by which cryatalizatiou 
takes place, cne metal or mineral a*'8umiug a certain 
geomoirioal shape another some different oue, and so 
on. In addition to all this there will be relief maps, 
transparencies and photographs of American soouery. 
This will include mjst important views in mountain*- 
ons regions, great deserts and other remarkable 
locnhtiea of interest from agengraphioal point.of view. 
Photography in this line has been made a specialty 
by tho survey, which possesses a great collection of 
such works of art. If there were more money to 
spend it is probable that visitors at the Fair would 
have a chance to see some of the enormous fossil 
reptiles of the pa^t, which Major Powoll’s bureau 
has bi on digging up during the last nine years ; but 
presumably only pictures of them will be shown, 
♦ 
BARK AND DRUG REPORT. 
(From the Chemist and 
London, Sept. 12. 
AhRl'A Nuts have been very acarce lately, a parcel of 47 
p.\ukages has, however, arrived this week. 
Cinchona.— A t bark sales on Tueslay a very small 
quautlty of oinchoua bark was offered— In fact tho aacUon 
was one of the smallost on record. The catalogues com- 
prised, of— 
Pkgs. Pkgs. 
Ceylon bark .. ... 630 of which 544 were sold 
East Indian bark ... ... 403 „ 3:^8 ,, 
South American bark ... 116 „ — „ 
Jamaica bark ... ... 2 ,, —*1* 
Total ... .,. 1160 „ 932 „ 
With the exception of a few parcels of Indian Crown 
lark, there wore very few lots of good quality among the 
barks of Eastern growth. The supply of South American 
Calisaya also comprised sumo noh parcels, butallofthis 
was limited too iughly, and not a single bale of thin 
kind was sold. There was a fair amount of competi- 
tion, and the unit reaiaiuml stntiouary at anaverege of l^l 
per cwt. 
The following are the approximate quantities purchased 
by the prlncipsl buyers : — 
lb. 
Agents for the Maaobeimand Amsterdam works 
., Burnswick factory ... 
„ Itallanaud American works ... 
,, Frankfort o/M and Stuttgart works.. 
„ Auerbach works ... ... 
Mosers. Howards & Bous ... ... ... 
Other manufacturers 
Sundry druggists, &c. ... ... 
75,378 
35,021 
29,176 
24.172 
12,103 
8.367 
5,586 
Total quantity of bark sold ... ... 180,803 
Bought In or withdrawn ... 46,967 
Total quantity offerei ... „. 236,770 
At the lost Amsi-erdam auctions, which were held on 
the 3rd intitant, 248,700 kllo^. bark were offered. Of this 
quantity laauufacturexs purchased 192,812 kilos., equalling 
8,995 kites. (317,254 o/..) quinine sulphate. Buudrydrug- 
gisls bought 20,781 Kilos, bark, and 35,180 kilos , repro- 
renting 1,448 Kilos, sulphate of quinine, romamed unsold. 
Ti.B following were the pruchaNCsof the priuclpal buyers; 
—Auerbach factory, 68,190 ktloj. bark ; Powers & Weight- 
mao, 48.884 kilos. ; Brunswick works, 37,776 kilos. ; 
Biibringer & Boos, 15,060 kilos. ; Frankfort & Stuttgart 
works, 14,142 kilos.; Tillandicr, 10,829 kilos.; Howards & 
Sous, 1,474 kilos. I and various buyers, 6,462 kilos, bark. 
^ 
IMPROVING WORN LANDS. 
Major Howard Swineford read a paper on this subject 
at a Southern institato. Amouir other tbiogs he said 
as regards green manuriog. Tbe practice of growing 
crops for the purpo.'e of ploughing them under to 
lertilize the soil is ons that, in my opinion, has a vory 
much greater advantage than any other, and there is 
DO belter way of cheaply improving it than this. 
To procure a suSioieut supply of niauiire is at the 
best a very costly prooeBS,but a crop that may be easily 
grown in a few months and then turned under may 
furnish to tbe soil as much fertilizing matter as 
eight or ten tons of manure per acre and this 
process may bo repeated several times in one year. 
Manuring with green crops is not only the most 
economical but, to most lands, one of tbe surest and 
moat speedy means of improving thoteztnre and fertili- 
zing properties of the soil. Besides furushing plant- 
food the soil is made more mellow and better fitted for 
prodnoing otiior crops. Various crops are used for 
this purpose, some of oonrse »to more valuable thaa 
