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Show Vlll CONTENTS. CHAPTER IX. THE EFFECTS oF cERTAIN AI.JK.t\.T.OID PoisoNs, OTHEH SUBSTANCES AND V APOURS. Strychnine, salts of- Quinine, sulphate of, does not soon. arrest the movement of the protoplasn:- Other sa~ts of quinine- Digitaline - ·Nicotine- Atro;rnnq- Veratrme Colchicine- Theine - Curare - Morphm -Hyoscyamus - Poison of the cobra, apparently accelerates the. rnovomo~tR of the protoplasm- Camphor, a p?werfu.l stJm.ulant, 1ts vapour narcotic- Certain essential mls exCite movement Glycerine- Water and certain solutions retard .or prevent the subsequent action of phosphate of ammonia-Alcohol innocuous its vapour narcotic and poisonous-Chloroform, sulphuric' and nitric ether, their stimulan~, poisonous,. and narcotic.; power - Carbonic acid narcotic, not quJCkly poisonous- Concluding remarks . . . . Pages 199- 228 • CI-IAPTER X. ON THE SENSITIVENESS OF THE LEAVES, AND ON THE J_;INES OF TRANSMISSION OF 'fHE MOTOR IMPULSE. Glands and summits of the tentacles alone sensitive- Transmission of the motor impulse down the . pedicels of the tentacles, and across the blade of the leaf- Aggregation of the protoplasm, a reflex action- First discharge of the motor impulse sudden- Direction of the movements of the tentacles -Motor impulse transmitted through tho cellular tissue- Mechanism of the movements- Nature of the motor impulse- Re-expansion of the tentacles . . , 229-261 tr CHAPTER XI. RECAPITULATION OF THE CHIEF 0BSERV ATIONS l }~ DROSERA ROTUNDIFOJ.. . IA, 262- 277 CONTENTS. CHAPTER XII. ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF DROSERA. IX Drosera anglica-Dro.r;era interrn edia-Drosera capensis-Drosera spathulata -D1·osera filiform is -Drosera binata-Concluding remarks .. Pages 278-285 CHAPTER XIII. DION lEA MUSCIPULA. Structure of the leaves- Sensitiveness of the filaments- Rapid movement of the lobes caused by irritation of the filamentsGlands, their power of se~retion-"-Slow movement caused by the absorption of animal matter- Evidence of absorption from the aggregated condition of the glands- Digestive power of the secretion- Action of chloroform, ether, and hydrocyanic acid-The manner in which insects are captured -Use of the marginal spikes- Kinds of insects capturedThe transmission of the motor impulse and mechanism of the movements- Re-expansion of the lobes 286-320 OB~APTER XIV. ALDROV ANDA VESICULOSA. Captures crustaceans- Structure of the leaves in comparison with those of Dionma- Absorption by the glands, by the quadrifid processes, and points on the infolded margins. Aldrovanda vesz'culosa, var. australis- Captures prey:Absorption of animal matter- Aldrovanda vesiculosa, var. verticillata- Concluding remarks . . 321-331 OI-IAPTER XV. DH.OSOPHYLLUM- RORIDULA- BYBLIS- GLANDULAR HAIRS OF OTHER PLANTS-CONCLUDING REMARKS ON THE DH.OSERACE..E. Drosophy1lum-Structure of leaves-Nature of the secretionManne- r of catching insects-Power of absorption-Digestion of animal substances-Summary on Drosophyllum-Roridula - Byblis- Glandular hairs of other plants, their power of absor1 tion- Saxifraga- Primula- Pelargonium- EricaMirabilis- Nicotiana- Summary on glandular hairs-Concluding remarks on the Droseracero 332-367 b |