Researches on the Manufacture of Various Kinds of Tea. 
BY 
Y. Kozai. 
Besides the true nutrients which must be taken from day to 
day, and without which we could not live, there are substances 
mostly called stimulants which although playing an important 
part in food, are not absolutely necessary to life, and indeed 
many persons live without them. The substances in the first 
group are classed by the Germans by the term Nahrungs¬ 
mittel, while those in the second group are known as Genuss¬ 
mittel. “ Die Genussmittel, says von Pettenkofer, sind wahre 
Menschenfreunde, sie helfen unserem Organismus über manche 
Schwierigkeiten hinweg. Ich möchte sie mit der Anwen¬ 
dung der richtigen Schmiere bei Bewegungsmaschinen ver¬ 
gleichen, welche zwar nicht die Dampfkraft ersetzen und ent¬ 
behrlich machen kann, aber dieser zu einer viel leichteren 
und regelmässigeren Wirksamkeit verhilft und ausserdem der 
Ausnutzung der Maschine ganz wesentlich vorbeugt.” In¬ 
deed the stimulants do not act essentially as nutrients, but they 
may be calculated as auxiliaries in the great work of main¬ 
taining life ; and consequently they have found great favour 
among the nations both present and past. Thus the Egypt¬ 
ians, Jews, Greeks, and Romans regarded alcoholic drinks as 
among the most precious luxuries of food; the Turks indulge 
in tobacco ; the Indians and Persians are in the habit of 
drinking ( hashish) ; while beer and wine form the favourite 
drinks of the most civilized nations of the present century. 
