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The American Naturalist Volume 38, PT. 2 by Essex Institute - Paperback
113.40 درهم

The American Naturalist Volume 38, PT. 2 by Essex Institute - Paperback

كن أول من يقيِّم هذا المنتج 

113.40 درهم 

  - ستوفر -113.40 درهم
الأسعار تشمل ضريبة القيمة المضافة  التفاصيل
الشحن مجاني التفاصيل
رقم ال ISBN
9781130433692
الفئات
تاريخ
الكاتب
Essex Institute
الناشر
Rarebooksclub.com
الوصف:

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...gigantea, though absent from the growth of later years. In both species they arise in the earlier spring wood. Jeffrey concludes that the tangentially disposed resin cysts of Sequoia ...

تشحن من الولايات المتحدة
اشحن الى دبي (تغيير المدينة)
التوصيل خلال السبت ٤ أغسطس - الأحد ٥ أغسطس الي دبي

حالة السلعة:
جديدة
البائع:
InternationalBookStore (87% تقييم ايجابي)

معلومات المنتج

  •  

    المواصفات

    رقم ال ISBN
    9781130433692
    الفئات
    تاريخ
    اللغات
    الانجليزية
    الرقم المميز للسلعة
    2724353258427
    المؤلفين
    الكاتب
    Essex Institute
    رقم ال ISBN
    9781130433692
    الفئات
    تاريخ
    اللغات
    الانجليزية
    الرقم المميز للسلعة
    2724353258427
    المؤلفين
    الكاتب
    Essex Institute
    المؤلفين
    الناشر
    Rarebooksclub.com
    معلومات تقنية
    غلاف الكتاب
    غلاف عادي
    اللغات والبلدان
    لغة الكتاب
    الانجليزية
    إقرأ المزيد
  •  

    الوصف:

    This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...gigantea, though absent from the growth of later years. In both species they arise in the

    This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...gigantea, though absent from the growth of later years. In both species they arise in the earlier spring wood. Jeffrey concludes that the tangentially disposed resin cysts of Sequoia sempervirens represent the result of injury, and he would apply this rule to all similar cases in the various species of Abies and Tsuga. Some years since, De Bar)' (9, pp. 490 and 495) formulated the law that "resin canals.... occur in the ligneous bundles of the same Abietineae which possess horizontal canals in the medullary rays." This is a law of very great constancy, and, as recently shown by Penhallow (39), it is applicable without exception to all living species. But as the same author (41, p. 42) has shown more recently, Sequoia burgessii from the Kocene of the Northwest Territories offers a remarkable exception to this law, since it shows well defined resin passages in the medullary rays, but without corresponding structures in the vascular bundles. As presented by existing species, Pseudotsuga, Larix, Picea and Pinus, without exception, show resin passages in both the radial and longitudinal positions. In transverse section they are scattered throughout, sometimes appearing chiefly in the summer wood, sometimes chiefly in the spring wood, or again about equally in the two regions, and they rarely conform to the precise law stated by De Bary (9, p. 495), that "they lie scattering in a ring in the external region of every annular layer." The constancy of their occurrence in the four genera mentioned involves very few features which call for special comment. In Pseudotsuga and Larix the resin passages are scattering. Sometimes they not infrequently unite in pairs so as to form short, tangential series and they thus approach the type of Tsuga or Abies.

    خصائص المنتج:
    • الفئات: تاريخ
    • غلاف الكتاب: غلاف عادي
    • لغة الكتاب: الانجليزية
    • الكاتب: Essex Institute
    • الناشر: Rarebooksclub.com
    • رقم ال ISBN: 9781130433692
    • عدد الصفحات: 132
    • لأبعاد (الارتفاع*العرض*العمق): 9.69 x 7.44 x 0.28 inches
 

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