Nitrous oxide and oxygen, 8, 12, 60 various systems for, 67, 70, 130 for use in major surgery, 72 with ethyl chloride, 131 O Obesity, 158, 165 Obstruction, intestinal, 141 respiratory, 15, 141 Oil ether, Gwathmey’s method of, 93 Oligæmia in shock, 10 Omnopon, 44 Open method, definition of, 28 chloroform, 117 ether, 83 ethyl chloride, 123 O’Malley’s technique for intra-nasal surgery, 160 Ormsby’s inhaler, 81, 137 Over-dosage, 36, 110, 144 with nitrous oxide, 54 Oxygen, reduction in blood in anæsthesia, 206 as a relief in asphyxia, 27 to old patients, 165 with nitrous oxide (_see_ Nitrous Oxide and Oxygen) with nitrous oxide and ethyl chloride, 130 P Paralysis, musculo-spiral, 157 Patella reflex in anæsthesia, 3 Percentages of chloroform and ether required in anæsthesia, 6 of chloroform, 111 of ether, 86, 99, 201, 204 Perhalation method, definition of, 28 ether (_see_ open Ether) Phenomena of anæsthesia normal, 33 abnormal, 38 of nitrous oxide, 52 of ethyl chloride, 125 Pericarditis as a cause of death in anæsthesia, 168 Phillip’s artificial airway, 23, 160 Physics of natural respiration, 96 Physiology of anæsthetic drugs, 1 of asphyxia, 17 of chloroform, 109 of ether, 75 of ethyl chloride, 122 of nitrous oxide, 46 Phthisis, 167 Pneumonia, post anæsthetic, 157 Position in anæsthesia, 157 Positive pressure in nitrous oxide, 52 in nitrous oxide and oxygen, 66 Post-chloroform poisoning, 153 Post anæsthetic complications, 150 Pregnancy, anæsthesia in, 169 Preliminary hypodermic medication, 11, 43, 152 Preparation of patient, 42 Primary syncope, 110, 143 Protection from shock by general anæsthetics, 8 Pulse, rate in shock, 6 clinical observation of, 37 Pupil, light reflex of, 32 size of, 35 in asphyxia, 17 Purging before anæsthetics, 40 Q Quinine and urea hydrochloride, 174 R Rebreathing method, 18 in nitrous oxide, 68 Rectal administration of ether, 93 Rectal saline, 42 Reflexes as a cause of shock, 4, 6 order of disappearance of, 3 Reflex, conjunctival, 31, 35 corneal, 32, 35 light, 32, 35 patella, 3 skin, 37 Reflex syncope, 8, 112, 145 Regional anæsthesia, 179 Renal disease, 163 Rendle’s cone, 135 Repeated administrations, 60, 156 Respiration, arrest of, 142 artificial, 146 blowing, 34, 89 crowing, 16 depressed, 39, 43 effect of morphia and chloroform upon, 43, 86 normal, 34 obstructed, 15, 141, 166 Respiration, physics of natural, 96 reflex arrest of, 39