L739 S35 1890 PREFACE. THIS essay is an English edition of a book published in Danish in the spring of this year in Copenhagen. It must be considered as an attempt to show how far diseases of the nasal cavity may affect asthmatic attacks. It is thought that PROF. HACK's opinions were in this respect too exaggerated, and ought therefore to be considerably modified, and in treating upon the subject this end has been kept in view. COPENHAGEN. December, 1889. THE AUTHOR. |