Tits J\\if((r(ilist,s' Companion. 
Fusibility of Cryolite, 
A soiiiewluit lengthy article or ervo- 
lite in last issue leads me to suspect 
its writer, Dr. Mason, is more acquaint¬ 
ed with it as its character is described 
by authorities, than by personal prac¬ 
tical work. I would like to ask if any 
one has ever suspected its fusibility is 
at a lower tem|)crature when placed 
in the scale of fusibility than when 
l)laced in a candle’s tiame V 
It has been my experience, since 
Random JVotes noticed the fact, to ])e 
disappointed in its tusibility, I would 
like to offer a tine mineral as compen¬ 
sation for the best essay on the causes 
of varience in the fusibility of cryolite, 
if there are any, to any reader willing 
to experiment. W. 8. Beekman, 
West Medford, Mass. 
Birds of Green County, Pennsyl¬ 
vania. 
BY J. \V. JACOBS, WAYNESBCRG, PA. 
I do not claim that tliis is complete, 
as there are from twenty-five to thirty- 
five unidentified species, including the 
warblers, vireos, creepers, sparrows, 
birds of prey, etc. 
1. — Hylocichla mmtelina, A¥ood 
Thrush. Common in swampy or damp 
woods. Breeds. Arrives about the 
middle of April; departs in October. 
2. — Hylochichla fuscesce?is, Wilson’s 
Thrush. Summer resident; breeds. 
Arrives last of April; departs in Sep¬ 
tember. 
7. —Merula migratory,Amcvionn Kob- 
in. Very abundant summer resident; 
breeds. Arrives in March; departs in 
Novem])er. A numbci' remain here 
throughout the winter. 
11. —Mimas polyglottus,^l oekingBi rd. 
Seen and heard occasionally; never 
breeds here. 
12. —Galeoscopfes caroline?isis,i 'a 11 )i ixl. 
Very common summer resident; bi-eeds. 
x4rrives first of May; de})arts in Octo¬ 
ber. 
13. — Harporhynchus rufus. Brown 
Thrasher, Common summer resident; 
breeds. Arrives in April: departs in 
September. 
22,— Scalia Bluebird. Abund¬ 
ant; breeds. Ari'ives in Mareh; de¬ 
parts in ISiovembe)-. A few remain 
during the winter. 
27.— Polioptila caernlea, Blue-gray 
Gnatcatcher. (’ommon summer resi¬ 
dent; breeds. Arrives early in April: 
departs the first of September. 
TO bp: continued. 
CORRESPONDENCE. 
AVhile loading freight at tlie Aickel 
Plate depot yesterday (Nov. 9th.), I 
noticed English Sparrows flittering 
aliout my head, with strings in their 
beaks. I sat down and watched them 
a moment and found they were repair¬ 
ing a Pewee’s nest over the freight house 
door. Do they breed at all seasons of 
the year V There is snow six inches 
deep here, so I thought this was a rare 
occurrance. M. R. Potter, 
AVest S[)ringfield, Penn. 
As 1 have received many inijuiries 
as to the description of coal fossils 
found in this vicinity,! take the oppor¬ 
tunity of answering through the col¬ 
umns of jour magazine. The fossils 
are found on the rock banks surround¬ 
ing the town. They are found in mas¬ 
ses of shale weighing from twenty-five 
to fifty pounds, which may be split 
open and both the impression and the 
