From a procedures section in a document:

Transfer 1.5 g bovine milk powder into a 200 ml volumetric beaker.

Is it common practice to omit of in construction of the kind

1.5 g (of) bovine milk powder

I have the impression that it is, but I'm not 100% sure. Maybe there's some book describing this condensed style of writing, and this omission of prepositions is mentioned there, but I haven't found a clear mention by googling.

Neither did I find any discussions of this on language-related websites.

  • 1
    I have seen it, e.g. "introduce 10mg saline [solution]", so it is probably common usage in highly technical documents. For more general readers, I would use a preposition.
    – Mick
    Dec 11, 2016 at 12:06
  • @Mick it's also pretty much ubiquitous in cooking recipes. I guess it's just the case of terseness and the ability to quickly skim the text for information being more important than proper grammar. Dec 11, 2016 at 12:23
  • 1
    @MaciejStachowski Cooking recipes are highly technical (for me). Don't get me wrong. I can microwave a curry.
    – Mick
    Dec 11, 2016 at 12:40

1 Answer 1


The use of the preposition "of" is definitely grammatically correct; its omission is widely accepted and understood in that context, technical (field of Chemistry) English.

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