The following Table exhibits the more important differences between the nomenclature of the London Pharmacopoeia, 1851, and the British Pharmacopoeia, 1864. The substances represented by the names which stand opposite to one another in the columns of the table, are, for all practical purposes, identical. The second division of the table indicates those alterations in the strength of preparations of sufficient importance to render them essential to be borne in mind in prescribing. Many minor differences of strength will be discovered, depending on the alteration in the value of the solid ounce; but even when these occur in the preparations of the more active medicines, they will not materially influence the doses, being far less than those due to the varying qualities of drugs:

London Pharmacopoeia, 1851.

British Pharmacopoeia.

Ammoniac Sesquicarbonas

Ammoniae Carbonas

Antimonii Oxysulphuretum

Antimonium Sulphuratum

Antimonii Potassio-Tartras

Antimonium Tartaratum

Bismuthi Nitras

Bismuthum Album

Calx Chlorinata

Calx Chlorata

Chloroformyl

Chloroformum

Ferri Potassio-Tartras

Ferrum Tartaratum

Hydrargyri Bichloridum

Hydrargyrum Corrosivum Sub-limatum

Hydrargyri Biniodidum (1836)

Hydrargyri Iodidum Rubrum

Hydrargyri Chloridum

Calomelas

Hydrargyri Iodidum

Hydrargyri Iodidum Viride

Hydrargyri Precipitatum Album

Hydrargyrum Ammoniatum

Hydrargyri Nitrico-Oxidum

Hydrargyri Oxidum Rubrum

Iodinium

Iodum

Liquor Chlorinii

Liquor Chlori

Liquor Sodae Chlorinatae

Liquor Sodas Chloratae

Magnesia

Magnesia Levis

Magnesias Carbonas

Magrnesiae Carbonas Levis

(The heavy variety of Magnesia and its Carbonate being now termed Magnesia and Magnesias Carbonas.)

London Pharmacopoeia, 1851.

British Pharmacopoeia.

Oleum Tiglii

Oleum Crotonis

Plumbi Oxidum

Lithargyrum

Potassae Hydras

Potassa Caustica

Potassii Sulphuretum

Potassa Sulphurata

Quinae Disulphas

Quiniae Sulphas

Sacchari Faex

Theriaca

Sapo

Sapo Durus

Thus

Thus Americana

Confectio Amygdalae

Pulvis Amygdalae Compositus

Confectio Aromatica

Pulvis Cretae Aromaticus

Infusum Rosae Compositum

Infusum Rosae Acidum

Mistura Camphorae

Aqua Camphorae

Pilula Galbani Composita

Pilula Assafoetidae Composita

Pilula Saponis Composita

Pilula Opii

Pulvis Ipecacuanhae Compositus

Pulvis Ipecacuanhae cum Opio

Pulvis Kino Compositus

Pulvis Kino cum Opio

Tinctura Camphorae Composita

Tinctura Camphorae cum Opio