| Description | Your Excellency!
The peculiar attention, you have given to my past labours is a suffienct inducement for me to request your favour of the presebt observations, respecting the cuases by which the impurity of the air on board of schip is generated and the means of producing salubrity and purity of the aire
Your Excellency!
By your approbation of the above I apprehendthat they will add new resources to the Russian medical navy-practice, that have never yet been called to her assistance; in by doing so you will give present support to my study and very much oblige
Your excellency
humbly obedient servant
Surgeon Virchnevsky |