Barrett, R. H.

Essex, H. E.

Seldon, T. H.

English

University of Minnesota, Morris (UMM): Digital Well

Journal of the Minnesota Academy of Science Volume 7 Number 1 Article 7 4-1939 A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit T. H. Seldon R. H. Barrett H. E. Essex Follow this and additional works at: https://digitalcommons.morris.umn.edu/jmas  Part of the Biology Commons, and the Zoology Commons Recommended Citation Seldon, T. H., Barrett, R. H., & Essex, H. E. (1939). A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit. Journal of the Minnesota Academy of Science, Vol. 7 No.1, 26-27. Retrieved from https://digitalcommons.morris.umn.edu/jmas/vol7/iss1/7 This Article is brought to you for free and open access by the Journals at University of Minnesota Morris Digital Well. It has been accepted for inclusion in Journal of the Minnesota Academy of Science by an authorized editor of University of Minnesota Morris Digital Well. For more information, please contact skulann@morris.umn.edu. 26 THE l\1INNESOTA ACADEMY OF SCIENCE TABLE VIL-Result of Backcross (al S ho/+ S' + 'i? x S' J ). October 24, 1938 Totals ............... . Star Star-recessive 1,711 Star-recessive 1,871 N 3,582 A final test made use of the mating: al S ho/Sr females by males homozygous for the three recessives - al, Sr, and ho -with the re-sult shown in Table VIII: TABLE VIII.-Result of Backcross (al S ho/ + S' + 'i? x al S' ho J ). Parental Combinations Recombinations Aristaless A . t St St Arista- St Region 1 Region 2 Star Star- Star- ris a- ar ~r- less Star ar~ N al-S- S--ho Recessive recessive less Star- Recessive St Recessive Heldout recessive Heldout Rece~~ive Heldout 394 1,948 19 9 36 71 2,477 1.1% 4.3% With the exception of a possible cross-over type in Table VI, there is strong evidence that Star-recessive is an allelomorph of Star. A PERIPHERAL VASCULAR SYSTEM AS SEEN BY MEANS OF A CLARK WINDOW IN THE EAR OF THE RABBIT (A DEMONSTRATION) T. H. SELDON, R. H. BARRETT, AND H. E. EssE..'C The Mayo Clinic and Mayo Foundation A window has been devised in such a manner that it can be . placed in the ear of a rabbit. New blood vessels which grow into the window may be visualized by the use of the microscope. Studies of the development of the capillary network may be made and the re-action of the newly formed vessels to various stimuli may be de-termined. The window consists of several layers of celluloid and so con-structed that a space of known depth is left between the two halves of the window into which the ingrowth of new vascular tissue may take place. These windows are so constructed that the known depth of the space into which the vessels grow is 75 p.,p.,. Transmitted light may be carried through this tissue very easily and the vessels and circulation observed. · PROCEEDINGS, VOLUME SEVEN, 1939 27 The window is inserted into the ear of the rabbit under nembu-tal anesthesia using sterile technic. The first vessels appear about the fifth day following the opera-tion. At the end of the third week the window contains blood vessels consisting of arteries, arterioles, capillaries, venules and veins. A KEY TO SNAKES OF MINNESOTA MILTON D. THOMPSON Minneapolis Public Library Miiseum I. Tail ending in a rattle. Pupil of the eye vertical. Pit between the nostril and the eye. (See 2) la. Tail not ending in a rattle. Pupil of eye round. Pit not present. (See 3) 2. Crown of head between the eyes covered by a few large regu-lar scales and no small ones. Generally grey color with several dark dorsal blotches. Size small. Massasauga Sistrurus c. catenatus 2a. Crown of head between the eyes covered by two large scales and many small irregular ones. Usually of a yellow background with black markings. The yellow may vary from yellow to black. Tail black. 3. Anal plate entire. (See 4) 3a. Anal plate divided. (See 9) 4. Scales keeled. (See 5) 4a. Scales smooth without keels. (See 8) 5. Snake bearing longitudinal stripes. (See 6) Timber rattle snake Crotalus h. horridus 5a. Snake spotted and without stripes. Three series of b-rownish black dorsal spots on yellow background, one series down the back and one on each side, except in young which are of a general grey color, mottled with dark brown, and not having a dark band over the nose. Bull snake Pituophis sayi 6. Side stripe in the third and fourth scale rows from the bottom. · Plain garter snake Thamnophis r. radix 

A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit

https://digitalcommons.morris.umn.edu/cgi/viewcontent.cgi?article=1588&context=jmas

A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit

Abstract

Similar works

Full text

Available Versions

University of Minnesota, Morris (UMM): Digital Well