| 192PHILADELPHIA, October 1st, 1880.
DEAR SIR: We desire to call your attention to the
"ENGLISH MECHANIC & WORLD OF SCIENCE,"
an English periodical of great value, and one which is of universal interest to those
interested in scientific matters. It is a weekly illustrated journal; each number containing twenty-four pages (exclusive of advertisements), nine inches by thirteen; each page comprising three columns. It numbers among its regular or occasional contributors many of the best-known names in science. We give below the table of contents of the first number which comes to hand, namely, that of July 23d, 1880.
CONTENTS.
ARTICLES
Collery Explosions and safety lamps... 461
Artificial Diamonds and Precious Stones... 461
The Watch, and How to Repair It... 462
The Isophotal Binocular Microscope... 464
Lock-Nuts... 465
Enriching Coal Gas... 465
On Bleaching and Washing Microscopical Sections... 465
Petroleum and Water Gas fuel in Locomotives... 466
A Yellow Rain... 466
A New Developer... 466
Useful and Scientific Notes... 467
Scientific News... 467
LETTERS (From 17588 to 17628):---
Photograph of Frustulia Saxonica, by Mr. S.
Wells of Boston, U.S.A---Powell and Lealand's Newest Formula 1/4 Water Immersion--- Inexpensive Microscopes, etc... 468
Microscopical---80,000 Diameters--- Supposed Chromatisation of Light by a Microscope Slide---Chromatisation of Light by a Glass Plate---The Meteor of July 9th---Jupiter---Periscopic Eye-pieces---Nebula---Carbonic Acid---Sunspot---Jupiter---57 [Messier]---[Lyrae] 469
Lunar Mists and Clouds---Lunar Rainbow---Sunspots---Oxygen in the Sun---Centering Lenses---Blowpipe Analysis... 470
Alphabetical Manual of Blowpipe Analysis---The Eames Vacuum Brake---The Trials
of Continuous Brakes upon the Lancashire and Yorkshire Railway---Vapor Densities
---Water Anlaysis... 471
A New Tricycle---Bicycle Ideas---Mounting Battery Plates---Aquarium---A Mercurial
Air-Pump... 472
Lathes and the Hire-Purchase System---Dynamo-Machine Designing. II.---"Fiddler"
on Soundboards---How to Make a Violin... 473
Impure Drinking Water: Its Sanitary Import. II... 474
Flight of Certain Sea Birds---The Opaque Lantern... 475
The Achromatic Object-Glass---Physical Hypotheses---Animal or Vegetable... 476
Improvements in Bunsen Burners---Light Theories, etc.. etc.---Fairlie Engine---Single Boiler v. Double Boiler---A Candle-Holder, for Use with the Mouth Blowpipe... 477
Replies to Queries... 478
Unanswered Queries... 482
Queries (From 41060 to 41119)... 482
Chess... 483
Answers to Correspondents... 484
The terms of subscription are very low, namely, for the United States, "13 shillings, or 3 dollars and 25 cents gold" (now equivalent to currency).
The following, from the English Mechanic, is self-explanatory:---
"Messrs. James W. Queen & Co., of 924 Chestnut Street, Philadelphia, Pa.,
are authorized to receive subscriptions for the United States for the ENGLISH MECHANIC, at the rate of Thirteen Shillings per annum, post free. The copies will be forwarded direct by mail from the publishing office in London. All subscriptions will commence with the number first issued after the receipt of the subscription. If back numbers are required to complete volumes, they must be paid for at the rate of 4d. each copy, to cover extra postage."
We consider the English Mechanic superior, in point of reliability and general excellence, to any other journal of similar scope known to us---American or
foreign. It contains much that is of special interest to microscopists. Specimen copy will be sent of application.
Respectfully,
JAMES W. QUEEN & CO.,
OPTICIANS, PHILADELPHIA.
Our Complete Catalogue sent by mail, on application, as follows:
Part 1st, Mathematical Instruments, 160 pages.
Part 2d, Optical Instruments, 188 "
Part 3d, Magic Lanterns and Slides, 150 "
Part 4th, Philosophical Instruments, 188 "
| 192Philadelphia, October 1st, 1880.
Dear Sir: We desire to call your attention to the
"ENGLISH MECHANIC & WORLD OF SCIENCE,"
an English periodical of great value, and one which is of universal interest to those
interested in scientific matters. It is a weekly illustrated journal; each number con-
taining twenty-four pages (exclusive of advertisements), nine inches by thirteen; each
page comprising htree columns. It numbers among its regular or occasional contributors
many of the best-known names in science. We give below the table of contents of the
first number which comes to hand, namely, that of july 23d, 1880.
Contents.
Articles
Collery Explosions and safety lamps... 461
Artificial Diamonds and Precious Stones... 461
The Watch, and How to Repair It... 462
The [Isophotal] Binocular Microscope... 464
Lock-Nuts... 465
Enriching Coal Gas... 465
On [Bleaching] and Washing Microscopical Sections... 465
Petroleum and Water Gas fuel in Locomo-
tives... 466
A Yellow Rain... 466
A New Developer... 466
Useful and Scientific Notes... 467
Scientific News... 467
LETTERS (From [17588] to 17628):---
Photograph of Frustulia Saxonica, by Mr. S.
Wells of Boston, U.S.A---Powell and Lea-
land's Newest Formula 1/4 Water Immer-
sion--- Inexpensive Microscopes, etc... 468
Microscopical---80,000 Diameters--- Supposed
Chromatisation of Light by a Microscope
Slide---Chromatisation of Light by a Glass
Plate---The Meteor of July 9th---Jupiter---
Periscopic Eye-pieces---Nebula---Carbonic
Acid---Sunspot---Jupiter---57 [Messier]---[Lyrae] 469
Lunar Mists and Clouds---Lunar Rainbow---
Sunspots---Oxygen in the Sun---Centering
Lenses---Blowpipe Analysis... 470
Alphabetical Manual of Blowpipe Analysis
---The Eames Vacuum Brake---The Trials
of Continuous Brakes upon the Lancashire
and Yorkshire Railway---Vapor Densities
---Water Anlaysis... 471
A New Tricycle---Bicycle Ideas---Mounting
Battery Plates---Aquarium---A Mercurial
Air-Pump... 472
Lathes and the Hire-Purchase System---Dyn-
amo-Machine Designing. II.---"Fiddler"
on Soundboards---How to Make a Violin. 473
Impure Drinking Water: Its Sanitary Im-
port. II... 474
Flight of Certain Sea Birds---The Opaque
Lantern... 475
The Achromatic Object-Glass---Physical Hy-
potheses---Animal or Vegetable... 476
Improvements in Bunsen Burners---Light
Theories, etc.. etc.---Fairlie Engine---Single
Boiler v. Double Boiler---A Candle-Holder,
for Use with the Mouth Blowpipe... 477
Replies to Queries... 478
Unanswered Queries... 482
Queries (From 41060 to 41119)... 482
Chess... 483
Answers to Correspondents... 484
The terms of subscription are very low, namely, for the United States, "13 shillings,
or 3 dollars and 25 cents gold" (now equivalent to currency).
The following, from the English Mechanic, is self-explanatory:---
"[Messrs]. James W. Queen & Co., of 924 Chestnut Street, Philadelphia, Pa.,
are authorized to receive subscriptions for the United States for the English Mechanic, at the rate
of Thirteen Shillings per annum, post free. The copies will be forwarded direct by mail from the
publishing office in London. All subscriptions will commence with the number first issued after the receipt of the subscription. If back numbers are required to complete volumes, they must be paid for
at the rate of 4d. each copy, to cover extra postage."
We consider the English Mechanic superior, in point of reliability and
general excellence, to any other journal of similar scope known to us--- American or
foreign. It contains much that is of special interest to microscopists. Specimen copy will
be sent of application.
Respectfully,
James W. Queen & Co.,
Opticians, Philadelphia.
Our Complete Catalogue sent by mail, on application, as follows:
Part 1st, Mathematical Instruments, 160 pages.
Part 2d, Optical Instruments, 188 "
Part 3d, Magic Lanterns and Slides, 150 "
Part 4th, Philosophical Instruments, 188 " |
