o4 THE TOXEK LECTURES. 



many communities saps the health both of teachers and pupils. In 

 our schools generally educational methods are bad, recreation is 

 too much neglected, and unhealthy emulation too much encour- 

 aged. Education is not properly individualized. 



10. Chronic neurasthenia is not common among men prominent 

 in public affairs and in the professions. Such men are, however, 

 sometimes the victims of a severe acute nervous jDrostration, which 

 may result in serious organic disease. 



11. Xervous strain is one of the causes of lithremia, which is of 

 not infrequent occurrence among public and professsional men, but 

 lithremia and neurasthenia are not interchangeable terms. 



12. The warnings of mental over- work and over-strain vary with 

 individuals and circumstances, but certain psychical symptoms, and 

 such physical symptoms as laxity or immobility of countenance, 

 diminished resisting power, heart failure, sleeplessness, cervico- 

 occipital pain or distress, and dyspepsia, are of most frequent oc- 

 currence. 



13. Insanity, particularly in the forms of melancholia and paretic 

 dementia, is sometimes developed by brain strain and over-work. 

 A family history of insanity is often present in such cases. 



14. Phthisis, diabetes, and Bright's disease — next to insanity — 

 are among the diseases most likely to be developed by mental over- 

 work. Men in whose families phthisis is hereditary should care- 

 fully guard against such over-work. 



15. Over-taxing the mind and nervous system may be the excit- 

 ing cause of almost any serious disorder to which chance, accident, 

 imprudence, or infection exposes the individual. 



16. Many diseases, not nervous in their seat or manifestation, 

 are developed directly or indirectly as the result of mental and 

 nervous strain, through exhaustion, impairment, or lesion of the 

 centres of the organic functions. 



