X. MISCELLANEOUS. 719 



B. Sex (average of 30 years). Males coloured red; females, blue. The 

 weekly deviations from the mean line are given in per-centages above and 

 below the average. 



C. Groups of diseases (average of 30 years). The upper thin line repre- 

 sents weekly averages from all causes of death whatever ; and the thick black 

 line, from all causes minus violent deaths. The red space embraces deaths 

 from all bowel complaints ; and it will be observed that the subtraction of 

 these diseases takes away the summer maximum from the general curve, 

 The blue space embraces all diseases of the respiratory organs ; and the dark 

 space, diseases of the brain and consumption. 



The mean weekly temperature is represented by the red line. 



Prepared by Alexander Buchan, Secretary, and Dr. Arthur Mitchell, 

 Chairman of the Medico-climatological Committee, and published in the 

 Society's Journal, vol. iv., p. 187. 



2920. Diagrams, showing the influence of weather on mortality 

 from different diseases and at different ages. Nos. II. and III. 



Scottish Meteorological Society* 



D. Showing mortality curves from special diseases, viz., small-pox, measles, 

 whooping-cough, scarlet fever, typhus and typhoid fevers, erysipelas, metria, 

 rheumatism, pleurisy, and pericarditis. 



E. Showing mortality from bowel complaints, viz., dysentery, British 

 cholera, cholera, and diarrhoea. 



F. Mortality from diseases of the respiratory organs, viz., asthma, 

 bronchitis, pneumonia, and laryngitis. 



The curves under D, E, and F are the averages of 30 years, and the 

 deviations from the mean lines are given in per-centages above and below 

 the average. 



Prepared by Alexander Buchan, Secretary, and Dr. Arthur Mitchell, 

 Chairman of the Medico-climatological Committee, and published in the 

 Society's Journal, vol. iv., p. 187. 



2921. Diagrams, showing the mortality of British large towns. 

 No. I. shows the weekly mortality from all causes for large towns 

 of England, and No. II. for large towns in Scotland and Ireland. 

 The averages are in most cases 10 years. The weekly averages 

 aro calculated at the annual rate of mortality per 1,000 of the 

 population. Scottish Meteorological Society. 



The mean annual mortality per 1,000 of the population of each town is 

 given in the left-hand margin. The red lines show the deviations from this 

 average for each week of the year. 



No. III. shows the weekly mortality from diarrhoea for large towns of 

 England, and for Edinburgh. The averages are in most cases for 10 years^ 

 The weekly averages are calculated at the annual rate of mortality per 1,000 

 of population. The breadth of space coloured red shows, for each week, the 

 rate of fatality for each town. 



Prepared by Alexander Buchan, Secretary, and published in the Society's 

 Journal, vol. iv., p. 337. 



2922. Diagram, showing the steadiness of the mortality curve 

 of scarlet fever in each of the six epidemics which have occurred 

 in London from 1840 to 1874. Scottish Meteorological Society. 



A. represents the per-cent. of deviation from the mean line of each week's 

 average of each of the six epidemics. The duration of each epidemic is 



