Page:Popular Science Monthly Volume 32.djvu/132

From Wikisource
Jump to: navigation, search
This page has been proofread, but needs to be validated.
122
THE POPULAR SCIENCE MONTHLY.

CORRESPONDENCE.
 

DISSECTION OF A GLASS-SNAKE.
[SOME weeks ago Messrs. O. R. Glover and Charles H. Lawrence, of Chicago, favored us with a living specimen of joint- or glass-snake, which had been captured on a farm owned by them in Starke County, Indiana. With a view of obtaining, if possible, any facts in addition to what was published in the Correspondence department of the "Monthly" for February and April, and in the Popular Miscellany department for the latter month, the creature was sent for examination to Dr. W. A. Conklin, Director of the Central Park Menagerie, New York, who has kindly furnished the following report.—Ed.]

Editor Popular Science Monthly:

Sir: I delayed sending you any report on the chain-snake (ophibolus) for the following reason: Shortly after reaching the menagerie the snake laid a number of eggs, and, as I had some curiosity to see if they would be hatched, I decided not to disturb it for a few days. It remained six days coiled around the eggs, leaving them for a short time each morning to drink water. On the seventh day it was found dead. The theory that a full-fledged vertebrate animal such as this should possess power of unjointing and rejointing itself seems hardly worthy of discussion. I sent the specimen to Dr. W. S. Gottheil for dissection, and he writes me as follows: "There is a vertebral column, running the entire length of the animal, the individual segments of which are accurately fitted together, bound to each other by a complicated and firm system of ligaments, and containing continuous nerve-structures; here are muscles running from bone to bone, long internal organs, intestinal canal, liver, etc., and covering the whole is a perfectly continuous and very tough dermal envelope. There is no more possibility for it to unjoint than for a person to unjoint his head from his trunk. One peculiarity only is noticeable: the cloaca is very high up at the junction of the anterior and middle thirds of the animal's length, and the tail-piece is thus relatively very long."

I believe that in some of these animals the terminal segments of the body are neither so firmly attached nor so highly vitalized as the rest, and can be detached by a comparatively slight amount of violence, and without entailing any disability upon the animal. The tail being exceptionally long here, it may be that a comparatively large section of the body may become detached by a blow. The animal could not break into several pieces, and it certainly could not unite if it could do so.

W. A. Conklin,
Director of Central Park Menagerie.
 

 

FICTIONAL ASTRONOMY.

Editor Popular Science Monthly:

Sir: I note the letter of Anne M. Johnson, in the September number, on the astronomical mistake in "King Solomon's Mines." She is quite right in saying that others, besides Mr. Haggard, may make errors in regard to the moon. Here is an instance from so careful a writer as Andrew Lang: In his "Letters to Dead Authors," he tells Theocritus, "Thou wouldst see the dawn awake in rose and saffron across the waters, an Etna, gray and pale against the sky, and the setting crescent would dip strangely in the glow on her way to the sea." This is the reverse of the mistake made by Mr. Haggard and Anna Bowman Dodd. Edward King, in his recently-published poem, "A Venetian Lover," also says (line sixteen), "The young moon pales before approaching dawn." Many other similar instances might be quoted, some from rather unexpected sources.

But Mr. Haggard excels all competitors in that his error of making the crescent moon rise soon after sunset is only one of a series. By referring to the book, it will be seen that the very next night "the full moon rose in splendor about ten," without any explanation of the change from "crescent" to "full" in some twenty-four hours, or of a full moon rising so late in a country which seems somewhere near the tropic of Capricorn. Following the narrative a little further, we find that, on the succeeding day, there is an eclipse of the sun, with total darkness for nearly half an hour. As it is hardly necessary to mention, an eclipse of the sun can take place only at new moon, and the total obscuration never lasts more than a very few minutes—four, if I remember rightly. It will be seen that Mr. Haggard has made the most of his opportunities for blundering.

Edward H. Beebe,
Chicago, August 31, 1887.
 

 

ANOTHER ANOMALY IN PLANT-GROWTH.

Editor Popular Science Monthly:

Sir: To the illustrated letter of E. W. B. Canning, in your September number entitled "An Anomaly in Plant-Growth," I