CCXX 



NATURE 



\Oct. 30, 1879 



A LIST OF SOME INSTRUMENTS USED !N PRACTICAL PHYSIOLOGY, 



MANUFACTURED BY HAWKSLEY, 300, OXFORD STREET, LONDON, 



Inslniment Maker to all the Private and Endrnved Physiological Laboratories in the World, excepting those of France. 

 A complete and partly ilUustrated catalogue of physiological instruments is in progress, and will be soon published, and it will 

 contain descriptions of various sets of apparatus (and their prices), arranged for investigation and demonstration of all branches of 

 practical physiology. Also is being prepared, tables of constants and equivalents of weight, mass, and time, and other data, fouadi 

 useful in physiological laboratories, reduced principally to the metrical system, and compiled from the works of standard authorities, f 

 English and foreign. 



Foster's levers for muscles, i 'js. 6d. 



Moist chamber, .Sanderson'5, with strong forceps, writing lever 



electrode holders and terminals inclosed in glass shkde o^ 



stand, 3/. los. 6d. 



Double muscle telegraphs for demonstrating contraction. 



Sanderson's automatic thermometer for calling attention to a 



patient when a certain temperature is attained, 3/. 3. 

 Surface thermometers after Dr. Ord, per pair, 3/. 3^. 

 Do. do. Dr. Sibson, per pair, 2/. 2J-. 



Do. do. Dr. Dupre, per pair, 2/. 2s. 



Do. do. Dr. Seguin, per pair, los. 6d. 



Thermoscope, after Dr. Seguin, 10s. 6d. 

 Standard thermometer, divided and verified at Kew Observatory 



for verifying instruments used in clinical research. 

 Testing apparatus for thermometers, for comparing them with a 



standard, 10/. 

 Every form of thermometer used in clinical and physiological 



research. 

 Cathetometer especially made for thermometric observations. 

 Mirrors for ensuring the axis of vision, being at right angles to 



the axis of the thermometer column. 

 Differential thermopiles for surface temperature. 

 Insulated needles and harpoons for deep sealed temperattires. 

 Galvanometers to use with the above. 

 Perimeter for measuring and mapping the sensitive portion of 



the retina or of the blind spot, 3/. 3^. 

 Noematograph for registering the lime occupied in physical or 



mental processes. 

 Ditto, by F. Gallon, by means of a scale of y^^- of a second and 



a falling body. Hatching ovens or inaibators. 



Page's gas regulator, 5^., 7^. 6d., 10s. 6d. 

 Schafer's gas regulator, and hot stage complete, 3/. l^s. 6d. 

 Schemata, after Sanderson, Powell, Sibson, and Rutherford, 

 Sanderson's ditto, for use with a sphygmograph, by which nearly 



every character of radial tracing may be produced. 

 Sphygmograph after Sanderson, with delicate pressure scale, 



7/. 7s. 

 Ditto, combined with cirdiograph for taking the radial and 



cardiac traces simultaneously, 10/. 10/. 

 Gower's ditto, and cardiograph, xol. los. 

 Roy's ditto, nnd cardiograph, 10/. los. 

 Dr. Gov\er's hajmacytometer for counting blood corpuscle;. 



Dr. Gower's hjemoglobinometer for measuring amount of 



colouring matter in blood, 21^. 

 Gastric canula; and holder, 21s. 

 Du Bois Reym md's niducton apparatus, 4I. 4s. 

 Coat's apparatus impr ved by Dr. Sanderson, 30,?. 

 Electro marker for in'iicat'ng the moment of excitation. 

 Double lever inslrmiient for showing movements of auricle and 



ventricle. [or frog. 



Apparatus for recording the movements of the heart of a snaii 

 Sanderson's gas and mercury sphygmoscopes. 

 Kronecker's double }<as sphygmoscope. 

 Dr. H. Jones's sphygmometer. 

 Dr. Sibsnn's sphygmometer sphygmoscope. 

 Lud wig's clock lor transmitting or breaking currents in equal 



periods of time, 61. 

 Metronome arrangemcment of do., 3/. I5,f. 

 Stethometer for me.isuring the movement of the ribs in three 



direction^, in xitr of an inch. 



Do. do. do. in two directions, 3/. 3^. 



Do. do. do. for recording the same or. 



.paper. 

 Improved Pick's kymograph. 

 Rolls of paper, 500 yards (?) in one piece, 2ij'. 

 China clay, puis zinc wi^e, &c., for electrodes. 



Every instrument required in physiological work made on the 

 premises, all instruments are tested, and results of their action 

 accompany each instrument, every help given in designing new 

 forms of instruments and apparatus. 



Warm stages for the microscope simple and compound after 



Strieker, Brunton, Sanderson, Schiifer, and others, from 



2s. 6d. to 6qs. 

 Boilers, self-regulating with incubating cells for tubes and slips, 



with thermometer, i^s. 

 Stages for examining the circulation in the tongue, web, and 



mesentery of the frog, from 5^. 

 Stages for examining the circulation in the tail and fins of fishes, 



•js. 6d. 

 Injection apparatus (microscopic) in the form of various syringes 



and canulfc, others making pressure by air, water, and 



mercury, glass canulae, metal do. of every size. 

 Horizontal galvanometers, astatic, low resistance. 

 Reflecting galvanometers, after Sir W. Thomson. 

 Lippman's capillary electrometers, various, 5/. 5^. 

 Shunts for above J.uV-ttJj- ™- resistance of galvanometers. 

 Galvanometer mirrors -J m. thick, concave, all diameters. 

 Lamps, stands, screens, &c., to use with the above. 

 British Association unit or ohm, 3/. lar. 

 Excitors for nerves and muscles, from 5/. 

 Electrodes nonpolarisable and holders, simple, is. 6d., 2s. 6d. 



Do. do. very complete, double, iZs. 6d. 



Chronograph, after Marey, to use with diapason. • 



Do. do. Hawksley. 



Vibrator, after Page, this is an E.M. apparatus furnished with 



three or more steel rods, whose vibration frequency is 



50, 100 and 200 D.V. per second, to be used with 



chronograph. 

 Electromotor for driving recording apparatus, mercurial air 



pump or artificial respiration apparatus, 8/. Ss. 

 Merqurial respiration pump with adjustable crank movement to 



regulate the amount of air used, 8/. 8.f. 

 Czermak's rabbit-table and holder, $/. 5^^. 

 Pendulum recording apparatus, 30/. 

 <J"able with vertical, horizontal, and circular motions, for 



supporting and adjusting apparatus, 15/. to 25/. 

 Sanderson's recording apparatus with two cylinders, continuous 



trace arrangement ; may be used vertically or horizontally, 



and for smoke or ink tracings. Foucault's regulator V-bar 



to support apparatus, 24/. 

 Sanderson's recording apparatus with one cylinder and continuous 



trace arrangement, 16/. 

 Ludwig's recorder, two cylinders, to be used vertically or 



horizontally, 30/. 

 Oliver's recorder, to be used with one or more writers at the 



bedside of a patient, 10/. 

 Recording cylinder, worked by a jet of gas or a lamp with 



mechanical regulator. 

 Recording cylinder revolving once per hour or once in twelve 



hours for recording barometric, thermometric, hygro- 



metric movements, also the diurnal movement and growth 



of plants. 

 Tambours, after Sanderson and Marey, ^2s. 

 Cardiograph, Sanderson's, 50J. Do. Sibson's, 3/. 



Stethocardiograph, Sanderson's, 3/. y. 

 Brunton's double apparatus for investigating the action of drugs 



on muscles and nerves, *c. , 8/. 



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Sr 



Printed by R. Clay, Sons, and Taylor, atr and 8, Bread Street Hill, Queen Vict Tia Srteet, in the City of London, and published by 

 Macmillan and Co., at the Office, 29 and 30, Bedford Street, Covcnt Garden.— Thi/rsdav, October 30, 1879. 



