ip Imntaiimi of the fork Araktmf 
of Sciences, addressed to the ffiartttgtr 
iHiJStMttt* to participate in the exercises 
commemorative of the two hundredth an¬ 
niversary of the birth of the great Swedish 
naturalist, gr$n lit is thankfully received 
and accepted. 
Standing in a case in the office of the Director of 
the Carnegie Museum is an ancient microscope. It 
was at one time in the possession of Jacob Henrici, 
the head of the Economite Society. The Economites 
are a communistic society, which was founded by 
George Rapp, who was born in Wiirtemberg in the 
year 1770. The object of the society was, so far as 
possible, to return to the teachings of primitive Christ¬ 
ianity, as understood by them. Encountering the 
opposition of the civil authorities in Europe, the Econo¬ 
mites migrated to America in 1803, and first establish¬ 
ed themselves in Butler County, Pennsylvania, where 
they built in the midst of what was at that time a 
region of almost unbroken forests a village, to which 
they gave the name of Harmony. It stood upon the 
banks of the Conequenessing Creek. In 1817 they 
removed to the banks of the Wabash River, in Indiana, 
and founded a settlement which they called New 
Harmony. Financial difficulties led to the sale of the 
tract of land which they had acquired in Indiana, and 
