THE BIG TREES OF CALIFORNIA.

We have previously spoken of the large Sequoiæ of California, which have justly a universal celebrity, and shall now render our remarks upon the subject completer.

If there is any sight that can throw us into mute contemplation and show us the littleness of our own nature, it is assuredly that of high mountains like Mont Blanc, or waterfalls like Niagara. But yet we do not at the first instant take in all the grandeur of these, but must make the tour of Mont Blanc, or pass under the falls of Niagara and study it at different points in order to obtain a just idea of such marvels. And so it is with regard to the vegetable curiosities of the Sierra Nevada, in California.

When points for comparison fail us, our eye, one of the most imperfect of instruments, never gives us an accurate idea of objects, and it is for this reason that we have placed upon the annexed figure a five-story Paris house, drawn to the same scale as the "Grizzly Giant," one of the most ancient Sequoiæ of the Mariposa Grove, in California. This true vegetable giant is 105 feet in diameter at the base, and 69 feet at 13 feet from the ground. It has, like many of the Sequoiæ that surround it, been struck by lightning, but, in spite of that, its total height is still more than 300 feet. Some of its branches are more than six feet in diameter. Those who have seen our old oaks in the forest of Fontainebleau will be able to compare the effect of time and lightning upon such venerable relics, these in California being possibly contemporaries of the Roman Empire. A few of the trees have been razed to the base, and serve as floors for dancing halls, while others, that have fallen, have been cut lengthwise and serve as bowling alleys. What especially distinguishes the wonderful region in which these Sequoiæ grow is the cleanness and beauty of the plains upon which they are found. In the virgin forests of South America, under the influence of a warm and damp atmosphere, the vegetation is so rank that, in order to open a passage, one is obliged to use an ax on the vines and thickets of interlaced plants. In California, on the contrary, the Sequoiæ, which are situated at an altitude of from 5,000 to 7,000 feet above the Pacific Ocean, are easily accessible. The routes are almost traced by nature, dangerous animals are rare, the summer temperature is delicious there, and hotels are everywhere being erected, as in Switzerland, to serve as a retreat and promenading place for tourists.—La Nature.

THE "GRIZZLY GIANT," ONE OF THE CALIFORNIAN SEQUOIÆ.


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TABLE OF CONTENTS.
PAGE
I.CHEMISTRY AND METALLURGY.—[Preparation of Chlorhydrines][6452]
[Chemical Compounds Made by Compression. By M. W. Spring.][6452]
[Copper Alloys among the Ancients. By Prof. E. Reyer.]—A valuable and important paper, full of useful information, showing the geology of the metals.—[Characteristics of copper alloys,] with tables showing constituents used in different countries.—[Casting the alloys.]—Hard bronze of the ancients.—[Summary of alloys used by the ancients][6452]
II.ENGINEERING AND MECHANICS.—[Bietrix's Vertical and Compound Engine.]—With description and numerous figures[6439]
[Improved Gas Engine.]—With [engraving][6440]
[Meters for Power and Electricity. By M. C. Vernon Boys.]—A valuable and instructive paper.—Showing the object of meters, the way in which some of them are made, and their manner of operating.—Several figures[6440]
[Raising and Moving Masonry Buildings.]—With full page of engravings, illustrating various examples of large buildings composed of masonry that have been moved and raised[6443]
III.TECHNOLOGY.—[Filter for Industrial Works.]—Showing how to make and use the filter.—With [engraving.][6443]
[The Val St. Lambert Glass Works.]—With full description and two illustrations.[6444]
[Proper shoeing.]—Horses' feet should be treated in accordance with the work expected of them.[6444]
[Ideas.—Relating to Milling. By A Looker-on.][6445]
[Photographs for Studying the Movements of Men and Animals. By M. Marey.]—How to avoid confusion in photographing rapid movements.—With [diagram.][6445]
[Detective Photography.]—As applied to criminal cases.[6445]
[Strength of Yellow Pine.][6449]
IV.ARCHITECTURE.—[English Lodges.]—With engraving.[6447]
[The Decay of the Building Stones. By Dr. A. A. Julien.][The building stones, their varieties, localities, and edifices constructed of each.][Durability of building stones in New York and vicinity.][Methods of trial of building stone.][Means of protection and preservation of stone.][6447]
V.ELECTRICITY.—[The History of the Electric Telegraph.]—First use of the Volta pile in telegraphy.—Description of Soemmering's apparatus.—With two engravings.[6446]
[A New Sulphate of Copper Pile.]—With [engraving.][6446]
VI.MEDICINE AND HYGIENE.—[Filth Diseases in Rural Districts.]—Showing why there is greater danger of poisoning from sewage in the country than in the city.—Several examples showing apparent causes and consequences.—How is the infection carried?[6450]
[The Physiology of Sleep.]—Giving different theories.[6451]
[A New Method for the Detection of Sugar in the Urine.][6452]
VII.MISCELLANEOUS.—[Elephants Moving Timber at Moulmein, Burmah.]—With [engraving.][6449]
[The Education of German Women.][6449]
[Horse Medicine Bit.]—With two engravings.[6451]
[The Big Trees of California.][6454]
[Science in Antiquity.—Heron's Pneumatic and compressing apparatus.]—With two engravings.[6450]