Teks asli (Inggris)

PREFACE. The unfortunate conditions surrounding the almost universal use of the oddly named commercial and with few exceptions record inks, and the so-called modern paper, is the motive for the writing of this book. The numerous color products of coal tar, now so largely employed in the preparation of ink, and the worse material utilized in the manufacture of the hard- finished writing papers, menace the future preservation of public and other records. Those who occupy official posit