IÔO A. C. OUDEMANS. ACARI. 



especially on the legs and in not youthful persons by greater pigmentation. In patients which 

 showed the most important objective symptoms, the process lasted from the beginning to the 

 end about three weeks. I don't think it by no means impossible that still greater sensibility 

 may occur in Europeans than I could observe in the six under my observation. One Indo- 

 European was vexed only in a little degree by the bushmite, and as to our Malay coolees, 

 thèse at the most got little blisters, which, however, sometimes were scratched to pièces. Of 

 the Papuas I never observed, that they showed any sensibility of the mites." 



„As real preservatives for the legs we sometimes made use of large covers of dense 

 cotton, which in the form of large stockings were put on over the shoes and pantaloons and 

 were tied above the knees. The model of thèse covers were afforded to us at Makassar by 

 Mrs. SARASIN. To increase the security thèse covers were dipped in Cajeput-oil before the 

 beginning of a mardi; they even protected the limbs againts leeches. Thèse covers, however, 

 encumber the walking, especially on damp slopes, and thus they seldom were employed. 

 Another tolerably good means of defence appeared a mixture of equal doses of Balsamum 

 peruvianum and spiritus fortior, with which each morning the feet and the underlegs were 

 rubbed; leaving a little of this mixture at the hands, thèse appeared also tolerably well 

 protected." 



„In stead of this mixture we sometimes made use ofunguentum hydrargyri or of Cajeput- 

 oil. This latter, however, showed less trusting results, presumptively because it is washed 

 away when the march went through little rivers and svvamps sooner than Balsamum peruvia- 

 num or unguentum hydrargyri. Both thèse last means generally were washed away in a little 

 river after a day march, in which instance we sometimes made use of carbolic soap, which 

 positively killed eventually penetrated mites. A few blisters, which nevertheless were observed 

 now and then, may hâve been obtained in the night bivouacs. The washing with carbolic 

 soap did not hâve at least any préventive action of any duration." 



„If préventive means had been omitted and did blisters show themselves, unguentum 

 hydrargyri immediately applied appeared to remove soon the itch; damp envelopes too of 

 2 to 3 procent carbolic acid procured this agreeable resuit. The sooner thèse means were 

 applied, the better, so that in some cases the disease remained reduced to the form of little 

 blisters; no yard of inflammation showed itself, and within two or three days ail was over. 

 Presumptively thus the mite was killed hère in loco, still before the quantity of poured out 

 poison was too great. Very often, however, one cornes too late, when having neglected ail 

 prophylactics, one tries to kill the mites in this way at the end of a day-march, or to 

 remove them by scrub off with soap. This appeared clearly on a visit of the Isle of Mios 

 Kairu, whereto some members of the expédition went, ail with unhurt legs, and from where 

 they returned on board after a few hours. Already then some members complained of itch, 

 and they who waited till the evening before applying unguentum hydrargyri, could not pre- 

 vent more the arising of little blisters and afterwards of bullae and wounds. It is still neces- 

 sary to mention that we generally were accustomed to put on a fresh set of clothes and to 

 lay down the field mattrasses not directly upon the soil but upon a pièce of waxed taffeta 

 or upon another imperméable material, in which also by day ail was rolled up. The day- 

 clothes, also the stockings and sometimes even the shoes, then generally were dried above 

 the fire and in its smoke. The one and the other may possibly explain, how we had experienced 



