| Page |
| Guglielmo Marconi Frontispiece |
M. Curie Explaining the Wonders of Radium at
the Sorbonne | 5 |
Dr. Danlos Treating a Lupus Patient with Radium
at the St. Louis Hospital, Paris | 13 |
| Radium as a Test for Real Diamonds | 19 |
At the approach of Radium pure gems are thrown into great
brilliancy, while imitations remain dull. |
M. and Mme. Curie Finishing the Preparation of
some Radium | 25 |
| M. Alberto Santos-Dumont | 29 |
Severo's Balloon, the "Pax," which on its First
Ascent at a Height of about 2,000 feet,
Burst and Exploded, Sending to a Terrible
Death both M. Severo and his Assistant | 33 |
| The Trial of Count Zeppelin's Air-Ship, July 2, 1900 | 37 |
| M. Santos-Dumont at Nineteen | 41 |
| M. Santos-Dumont's First Balloon (Spherical) | 43 |
| M. Santos-Dumont's Workshop | 45 |
| "Santos-Dumont No.1" | 49 |
| Basket of "Santos-Dumont No.1" | 52 |
| Showing propeller and motor. |
| "Santos-Dumont No.1" | 54 |
| Showing how it began to fold up in the middle. |
"Santos-Dumont No.5" Rounding Eiffel Tower,
July 13, 1901 | 57 |
| The Interior of the AËrodrome | 61 |
Showing its construction, the inflated balloon, and the pennant
with its mystic letters. |
| The Fall into the Courtyard of the Trocadero Hotel | 65 |
| "Santos-Dumont No.5." |
| "Santos-Dumont No.6"—The Prize Winner | 69 |
| Air-Ship Pointing almost Vertically Upward | 73 |
| Falling to the Sea | 73 |
| Just Before the Air-Ship Lost all its Gas | 74 |
| Losing its Gas and Sinking | 74 |
| The Balloon Falling to the Waves | 75 |
| Boats Around the Ruined Air-Ship | 75 |
| Manoeuvring Above the Bay at Monte Carlo | 77 |
| Professor John Milne | 80 |
| From a photograph by S. Suzuki, Kudanzaka, Tokio. |
Professor Milne's Sensitive Pendulum, or Seismograph,
as it Appears Enclosed in its Protecting Box | 81 |
The Sensitive Pendulum, or Seismograph, as it
Appears with the Protecting Box Removed | 81 |
| Gifu, Japan, after the Earthquake of 1891 | 85 |
This and the pictures following on pages 89, 101, 111, are from
Japanese photographs reproduced in "The Great Earthquake
in Japan, 1891," by John Milne and W. K. Burton. |
The Work of the Great Earthquake of 1891 in
Neo Valley, Japan | 89 |
Diagram Showing Vertical and Horizontal Sections
of the More Sensitive of Professor
Milne's Two Pendulums, or Seismographs | 93 |
Seismogram of a Borneo Earthquake that Occurred
September 20, 1897 | 94 |
Effect of the Great Earthquake of 1891 on the
Nagara Gawa Railway Bridge, Japan | 101 |
Pieces of a Submarine Cable Picked Up in the
Gulf of Mexico in 1888 | 108 |
The kinks are caused by seismic disturbances, and they show
how much distortion a cable can suffer and still remain
in good electrical condition, as th BOYS' SECOND BOOK OF
INVENTIONS
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