How can I find out how many Science Stockpiles have I activated?

I'm currently playing as Cultists, which means I get a lot of Industry and Science Stockpiles. As I understand it, I can use at most stockpile per turn (and per city in the case of Industry Stockpiles).

With Industry Stockpiles, it's easy to check how many activated stockpiles (or "boosters") are remaining on the city screen:

But Science Stockpiles apply to the whole empire, not just a single city, so they're not shown on the city screen:

But they're also not shown in the Empire Bonuses section of the Empire Screen:

So, is there some way to see them?

Solution 1:

As you've found, science stockpiles are not listed for individual cities, nor are they listed as an empire booster. The only location that seems to indicate that you have used a science stockpile is the Research Statistics on the Research Screen.

Using more than one science booster in a single turn will have apply the effect of one science booster each turn until they have all had an effect. This is shown below replaying 2 turns, the second time applying 2 science boosters on the first turn.

If you think you have more science boosters than will be needed for the rest of the game you can dispose of them in other ways:

1: Trade to another faction - this has restrictions as shown below

2: Sell your stockpiles on the market - at a rapidly diminishing price