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Link: • Carl Linnaeus to Abraham Bäck, March-April? 1756 n.s.
Dated . Sent from () to (). Written in Latin.

Optimo suo BAECKIO

Motus etiam in cunis.

Lac dulce recens coagulando tollit acidum; caseus inde nutrit. Lac aqua dilutum vix nutrit, cum oporteat esse prius caseus.

Defectus nutritionis debilitat intestina; intestina debilia generant semper acidum.

Ligaturae abdominis corroborando fibras juvant.

Amara omnia resistunt et putredini et acescentiae, sed laedunt tenerrimas fibras.

Quidquid roborat fibras tollit acidum. Hinc rhabarbarina proficua alternis diebus in refracta dosi, quamvis non purgarent alvum.

A peregrinis Tu abhorres, magis quam ego.

Absorbentia novisti omnia me melius.

Externe amara imprimis commendanda. Extracta, epithemata, Fel e variis animalibus.

Sed vereor, quod minus nutriatur tenella, ut prae debilitate defluat acido.

Panatella, jusculum cum cerevisia tenui, lacte, farina erit quotidianum. Vides, ut pallidi sint, qui juscula e farina et lacte; contra floridi, qui cum cerevisia hauriuntur certa juscula.

Domus repleta hospitibus, imprimis domicellis, ut nequeam graphice scribere.


In this letter Linnaeus advices Abraham BäckBäck, Abraham (1713-1795).
Swedish. Physician, president of the
Collegium Medicum, Stockholm. Close
friend of Linnaeus. Correspondent of
on food for a young girl [presumably the princess Sofia AlbertinaSofia Albertina, (1753-1829).
Swedish. Princess. Daughter of King
Adolf Fredrik and Queen Lovisa Ulrika,
sister of Gustav III and Karl XIII.
]. There is a movement even in the cradle.

Fresh, sweet milk loses its sourness when it thickens. That is why cheese is a good nutrient. There is no nutritive value in milk that has been diluted with water.

Insufficient food damages the intestines, and a weak stomach produces acidity.

A girdle around the belly stabilizes the muscles by supporting them.

All bitter food resists both rotting and souring but hurts the tenderest sinews.

All that strengthens the muscles takes away the sour. So, rhubarb is good every second day, although it does not purify the stomach.

Bäck is more afraid of foreign medicine than Linnaeus is. However, Bäck knows more about absorbents.

Bitter medicines, e.g. gall from various animals, are primarily for external use..

Linnaeus is afraid that the little girl gets too little food, so that she is getting too weak and cannot manage what she gets. She should get biscuits and a gruel of small beer, milk and flour every day. Bäck will see that the gruel of flour and milk is pale, while that with small beer has a stronger colour.

Linnaeus has a lot of guests in the house, especially young ladies, so he cannot write more explicitly.


a. original (KVA). [1] [2]


1. Bref och skrifvelser (1911), vol. I:5, p. 7-8   p.7  p.8.